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).
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.
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!