no-tethering-restrictions VS VPNHotspot

Carrier variants devices may come with built-in services that detect hotspot usage in "unprovisioned" devices. At least that was the general consensus; TMobile sniffs data for TTL and destination, it also hijacks your DNS queries whenever possible. Sounds complicated but all you really need to do is have DoT/DoH enabled on your devices (optional) and go down this thorough list of methods.

I managed to obtain the 2 parts by using a New-york VPN (NordVPN) on an old rooted android phone with VPNHotspot and setting it up as a repeater.

Either root (with all the hassle that entails with apps that don't like running on a rooted phone) then use apps like https://github.com/Mygod/VPNHotspot or change the custom ROM to one that supports that feature, such as LineageOS (I think S21 is supported, you'll have to research it yourself)

Root + VPN Hotspot. Read through that page well before rooting just for that, though. It's not always super straightforward.

Set up a VPN'ed hotspot from Android and connect to it from the Quest. You will need to have a rooted Android phone. Use VPNHotspot.

Only if the phone is rooted: https://github.com/Mygod/VPNHotspot

Yeah, you'd need to root your Android (do not recommend it) and use it with https://github.com/mygod/vpnhotspot

Thanx, any idea of any apps that don’t require root that is able to hide hotspot usage? This is the only one that I know of but requires root https://github.com/Mygod/VPNHotspot/releases

When you get a root check out this app https://github.com/Mygod/VPNHotspot and let us know how it's performing. I'm about doing same thing with my old 6T.

I currently use an app that makes my tethering data look like on-device data (VPN Hotspot).

If I understand correctly, VPN Hotspot may be what you need.