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Joplin
Joplin - the secure note taking and to-do app with synchronisation capabilities for Windows, macOS, Linux, Android and iOS.
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
Joplin seems like the clear winner. https://joplinapp.org/
I have my eye on Notea as well with the hope that it matures to what ive been looking for https://cinwell.com/notea/
For example, I use Zettlr, and sync the markdown files to Nextcloud, where they are compatible with Nextcloud Notes for quick online editing, and Nextcloud Notes on F-Droid for Android.
What I like about SN is that it has a decent community, and support for themes and extensions.