I had some trouble getting Vaultwarden connected to my phone and the Bitwarden Windows desktop application. So I created a video on the process.
Hopefully people find it useful.
Umbrel - Vaultwarden setup for Android and Windows
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It worked for me to setup the Windows version. But i use a iOS phone still looking for a solution on that… 
Could you try throwing the app port through Cloudflare Tunnel (the app in Umbrel Appstore) instead of Tor? Then, it will probably work on iOS as well.