This also applies to any other third-party library that a cpython build may link to, like the OpenSSL libs. Some legacy tools that depend on them may work in Rosetta 2 Intel-64 emulation mode on an Apple Silicon Mac but eventually that will go away so it is important to move away from any inadvertent Rosetta dependencies.

I don't use Homebrew myself but a quick web search comes up with a number of hits on how to proceed. It looks like the general idea is to save your list of installed brew packages, reinstall the base homebrew to install Apple Silicon native versions, and then reinstall the top-level packages you had and want and you should be good to go from there on.