Maybe run through the installation again, and run via Docker if you aren’t already. It was plug-and-play when I set it up

Alternatively, obsidian offers a 1st party paid sync feature

Obsidian livesync works really well. Notes are live synced between my desktop and Android device

https://github.com/vrtmrz/obsidian-livesync

I haven’t migrated apps (except ditching Evernote), but I use Obsidian with obsidian-livesync and it works great - typing on my phone live updates the notes on my PC. Downside is you need the self hosted software running somewhere