But IDK why requests3 wasn't transferred as well, and why issues appear to be disabled on the repo now.

The docs reference a timeout arg (that appears to default to the socket default timeout) for connect and/or read https://3.python-requests.org/user/advanced/#timeouts

And the tests reference a timeout argument. If that doesn't work, I wonder how much work it would be to send a PR (instead of just talking s to Ken and not contributing any code)