There are plenty, but there are also definitely a lot more on the Republican side. A majority of self-identified Democrats favor legalization, while a majority of self-identified Republicans are against: https://today.yougov.com/topics/politics/articles-reports/20...
> "Pretending it isn't a partisan issue is silly."
The stats to which you refer don't support that dismissal.
In that survey, 50% of Dems supported legalisation/decriminalisation (which you'll notice is not quite a majority, or is a narrow one if you ignore the undecideds) and 34% of Republicans supported it.
So it's a 16 percentage point difference. Yes there's more support among Democrats, but not so much so that you can dismiss it as a partisan issue.
Anecdotally, here in Australia, someone I know very well works in a government policy role administering sex work, and some of the most strident campaigning in favour of re-criminalisation comes from the left. In this state it was a conservative government that legalised it in the early 90s, in the first year they came to power after 10 years of social-democratic government. There's no campaign from the conservative side to re-criminalise it here.