Is there any means by which to use a general-purpose Tor Proxy over VPN on Android, GrapheneOS, & other AOSP-based mobile OSs?
Background:
As per the PG Tor Network blog post, PG recommends using Tor over a VPN:
If you have the ability to access a trusted VPN provider… you almost certainly should connect to Tor through a VPN… Because we already generally recommend that the vast majority of people use a trusted VPN provider for a variety of reasons, the following recommendation about connecting to Tor via a VPN likely applies to you
For more information on why this may be desirable, see Jonah’s video on Tor over VPN
Web Browsing: Not a Problem
The Tor Browser app is built with its own Tor proxy. Simply connect to your trusted VPN through the Android VPN slot, and Tor Browser will establish a Tor over VPN connection for that singular app
Other Web Services: Impossible?
Tools like Orbot or TorVPN (currently in beta) can establish a more general Tor proxy connection, and let you use Tor for non-browser web connections. However, they use AOSP’s singular VPN slot & dont support a direct proxy from Wireguard, OpenVPN, or other VPN configurations
My research has turned up nothing. Is there any way to accomplish this?