There are no supported drivers for it as far as I could find. The common answer is to use psycopg2cffi, but that hasn’t had a commit in like 4 years. The alternatives I could find were in the same shape or worse.
I recall looking at pg8000 in particular, but it didn't inspire confidence for our production use case. It had only 20 commits in 2019 and fewer than 100 stars. I also didn't have a good understanding of the performance tradeoffs (pypy/pg8000 vs C library).