I use Forgejo with Helixnotes. But I sync with the App PuppyGit.

I’m doing this about an intermediate step. My notes are all in a GIT repository. So I use GIT to create the synchronization between the different devices. On the smartphone with PuppyGit. Positive side effect: The note app itself does not require synchronization.

What is better? For simple notes it is enough and easy to understand. For other stuff I use AsciiDoc, LaTeX or something else.

Not fine. I have the same with PostmarketOS. No audio and really slow WiFi.

Really? I have PostmarketOS on my Fairphone. No audio and really slow WiFi. This is unusable.