Where best to post answers to questions the search engines couldn't help me with?

Where should we post niche stuff when we figure it out so Google and OpenAI can eat it and show it to those in need? I see lots of answers coming from reddit but I don't want to post there obviously. I tried stack exchange/askubuntu but the barriers to adding information are pretty big.

For instance today I switched from xfce4 to lxqt and all the passwords and sessions I had in Brave were invalid. There was no simple answer but after some work I figured out I needed to open seahorse and copy the brave secrets over to the new keys in kwalletmanager.

I'd write it up and post it somewhere in case the solution could help someone else but what's the best spot in your opinion?