They are certainly aligned with the US Democratic party, but I think it's a mistake to equate the Democrats with "the left" unless you're only speaking in that total American context where "Left=Dems, Right=GOP, end of story."
Where I live, US Democratic Party policy positions would be held by unelectable right wingers. I agree that confusing some kind of left alignment with the US Democratic Party is not advisable, even in parts of the USA.
the Democratic party of the USA is center-leftish at best.
For example they don't openly support
- unions
- universal free healthcare
- strong workers' guaranteed rights (paid holidays, paid sick leave, paternity/maternity, limited working hours - e.g. max 40 hours per week -, overtime pay etc. etc.)
Except for the word "free", https://democrats.org/where-we-stand/party-platform/achievin... makes their position on universal health care clear. Exactly how the cost gets shared by society is something that's a bit more nuanced (there's no way for it to be completely free; the question is how much is funded by taxes vs other fees).
https://www.opensecrets.org/orgs/facebook-inc/summary?all=20...
https://www.opensecrets.org/orgs/microsoft-corp/summary?id=D...
https://www.opensecrets.org/orgs/amazon-com/summary?all=2020...