Any way to get around only WiFi on remotes Android

Hi I have managed to get VPN to work out of my home with Roon, but alas the Roon app on Android won’t work without a WiFi connection. It just nags you all the time is there a way around this that anyone knows? If I set my phone as an access point my tablet or dap can connect via wireless I suppose and that would work but I would like to get to work on my phone over cellular if possible.