Logseq can be launched as a desktop app and in a web browser and has both iOS and Android apps. Official sync is a paid feature but there are other options (e.g. Syncthing).
Second (or third?) Logseq. Bit of a learning curve, at least for me and overall it suits me much better than Standard Notes, which I was using previously. Standard Notes is now way overpriced compared to what it initially was, so great timing as well. One gripe I have with Logseq is you are unable to export queries as a page or text doc. It definitely has its quirks, though overall it's great. And if anyone wants to share how they organise pages, tags, etc. feel free!
No problems at all.
I setup a 3-way folder sync between 3 nodes:
Desktop (Linux)
Android
VPS
VPS is always on, so even if my smartphone is not connected to the internet when I log off of my desktop, the smartphone automatically fetches the updated folder from the VPS .
I haven't used git for this purpose but I'd think the process would be tedious. Manual commit, push, fetch ...
Also, I tried to set it up with Nextcloud but I couldn't get Android Logseq to use the Nextcloud folder for some reason. I don't remember the exact issue.
I might have to try syncthing then im sure i can use git for versioning my notes from just one node and retain that feature. I use logseq so on desktop git syncing is automatic.