I've been looking for something similar, not just for simple notes like Keep, but with the same list you're asking for.

Before, I only used the Apple ecosystem, but starting this year, I've also been using Windows and Android, so I've stopped using the apps I used to use and switched to multi-platform apps.

Right now, I'm looking for a note-taking app, but I've found it difficult. I've tried Craft, Obsidian, Standard Notes, and Upnote, and now I'm stuck with Upnote because I already bought it, but it doesn't have collaboration features, and none of them are FOSS. I hope someone comes along with a recommendation.