I think my Wireguard VPN already does this, sans root? I enable my VPN and my hotspot connected laptop is now routing its traffic via my house.
Or am I missing what you're looking for?
Or am I missing what you're looking for?
My Android does have that option, under: Hotspot and tethering > Allow clients to use VPNs.
Note however, my ROM is based on LineageOS, probably the reason why not everyone got it?