Currently, the VPN setup in Android is lacking. Wireguard isn't configurable manually, and there's only space for one VPN. What I mean by that is that leak-proof split-tunnel is impossible in Android, and one can't use two VPNs (or VPN and TOR) together for different apps. (I.e.: say I want to route system traffic, like updates, through TOR, but I want my bank to use my VPN.) Maybe I'm just spoiled to a desktop, but I do think this is worthy of attention as it can undercut security as of now with split-tunnel leaks at least.
What I'd like to see is allowing multiple VPNs and more flexibility with the VPN settings to allow for routing certain apps through certain tunnels without worrying about potential leaks.
Disclaimer: I'm not demanding or assuming anything except that typing this could prompt the devs to see this and consider it worthy of their time. Please don't assume I'm somehow trying to make them bow to my every need by making a simple suggestion on something I think improving would create a lot of benefit.