Left of Center candidates have scored huge victories in the past year, but things haven't changed very much so far. Keep in mind that many of these governments are very new, so they haven't been given much of a chance yet.
OTOH, there is a lot of work to do and little of that work has been done so far.
Let's do a run-down to give you an idea, and I'll start with possibly the worst example - Honduras.

Six Honduran environmentalists have been found guilty of crimes against a mining company, in a case widely condemned by legal and human rights experts.

The activists, from the small community of Guapinol, have been held in pre-trial detention for two and a half years after opposing an iron oxide mine which has polluted rivers relied upon by thousands of people.
...
The defence intends to seek an amnesty for the convicted men, through a controversial law just passed by the new president.

Defence lawyer Edy Tabora said: “All eight men are innocent. The prosecutors failed to provide any evidence of a crime, never mind their participation in any activity that could be considered a crime. This is a political verdict that demonstrates the power of economic elites in this country.”

The new law in question was actually designed to give a broad pardon to the violent abuses of the ruling elites since the 2009 coup.
The mine was created on protected land that served as the water source for 42,000 people. The water was then polluted, and when demonstrations started the security guards shot several of the protestors.

Things in Peru are worse, but for an entirely different reason.

Peruvian Prime Minister Hector Valer confirmed on Saturday that he is departing just four days after being named to the post, following allegations that he beat his daughter and late wife, creating a new leadership vacuum in the Andean nation...

Castillo must now name his fourth cabinet in just six months, which he said will incorporate representatives of a range of political groups. It is unclear when an announcement will take place.

Castillo, a former schoolteacher and member of a Marxist-Leninist party, has moved increasingly to the right since taking office last July.

His first prime minister was a far-left party leader, who was replaced in October by a moderate-left politician, before Castillo appointed Valer this week.

Valer is a lawmaker and conservative Catholic who ran with a right-wing party before defecting to join a Congressional bloc that is friendly with Castillo.

It appears that Castillo is simply in over his head, while the right-wing opposition is very organized.

Now for better news. Let's start with Chile.

During January the Fundamental Rights commission of the Constitutional Convention of Chile proposed two different articles to guarantee a basic income. Following an increasing support and visibility of this proposal, the Chilean Basic Income Network collaborated with 11 members of the convention and proposed a basic income as a way of fulfilling the right to a vital minimum (mínimo vital) through a basic income. The articles proposed to be incorporated in the new constitution are:

“Article XXX (to be defined): Of the right to a vital minimum and to the universal basic income.

The State recognizes the human right to a vital minimum.

The State must provide each inhabitant of the Republic with a monetary transfer that is periodic, individual, unconditional and non-seizable.

To ensure this minimum, a sufficient amount of resources must be allocated within the Budget Law for the preservation of social services and benefits.

Wow. A UBI in Chile. That would make Chile waayyy more progressive than the U.S.
Chile is also pushing through some serious tax reforms as well, including a wealth tax.
However, not everything is coming up roses in Chile.

The balanced make-up of the incoming government suggests Boric, a 35-year-old lawmaker and former student protest leader, may look to push gradual reforms rather than abrupt changes some had feared in the world's top copper producing nation.

"Naming Mario Marcel as finance minister is a very good sign of economic stability, seen positively by markets," said Miguel Angel Lopez, a public affairs professor at the University of Chile, adding it was a mix of coalition allies and technocrats.

"It's all linked to a much more centrist, more pragmatic shift in terms of what Boric wants to do in his government."

Finally, things are looking good for the coming election in Colombia.

With less than four months to go before millions of Colombians head to the polls on May 29 for the 2022 presidential elections, left-wing progressive candidate Gustavo Petro has been shoring up support on the campaign trail. With a message that he would end oil and gas exploration the day he takes office (August 7), expropriate unproductive land, raise import duties on clothes, leather items and agroindustrial products, the head of the Colombia Humana party appears unstoppable on the campaign trial compared to his rivals.

While the former Senator and Mayor of Bogotá’s lead is impressive at 27%, he still remains short of clinching election day victory with 50% plus one vote.

The most recent poll by Semana and CNE puts independents Rodolfo Hernández second (14%), and Ingrid Betancourt (7%), third.

It's not as important as Lula winning in Brazil (short of assassination, that will happen), but Petro winning in Colombia would be huge!