I think for there are two already okay options. As Syncthings UI is already in the browser, one would be to just host that page in a way that it's remotely acce

I think for there are two already okay options. As Syncthings UI is already in the browser, one would be to just host that page in a way that it's remotely accessible (e.g. in you VPN, where I can highly recommend Tailscale). The other would be to use the option that Syncthing has built in to auto-accept folder invites from certain devices (that's what I have set up on my always-on server so I don't have to SSH into it every time).