You can argue whether or not they live up to those ideals but I think it's unquestionable that it's widely viewed as the leftwing party. Just like PAN is obviously conservative.
For example, We already had a Universal Basic Healthcare called Seguro Popular. Which was destroyed in 2018 by this regime on a tantrum which left millions without coverage. We went from 9% uncovered to 26% uncovered. They are still trying to figure out how to fix that.
https://pmc.ncbi.nlm.nih.gov/articles/PMC12639676/
The "Abrazos, no balazos" approach turned out to be the party colluding with organized crime to win elections.
Besides I'm not arguing over the success or even merits of her policies. I'm simply pointing out that she's clearly and obviously seen a left-leaning candidate. I don't think that's whatsoever a controversial take. It's certainly how her party has always been seen.
Now days we have to ask if political movements are committed to democracy even before we ask if the lean left or right.