As far as I am aware there is a topic per PEP on discourse that has had discussion mostly related to the specific PEP. I’m not aware of any general “weighing the options” topic on any discussion forum. I think so far it’s mostly just been people asking for refinements or changes to a specific PEP to make it more clear and/or more tolerable to that person.
Incase unfamiliarity with discourse is causing an issue in people finding the topics, and that’s what folks are stumbling with, here are links to each of the PEP specific topics:
Each thread seems to have somewhere between 30-50 total posts, so all in there’s maybe ~300 posts to read across all of them (and many of those posts are pretty short).