What VPN server type using a TP-Link AX55 for Android and Windoze 11?

First I read up on using OpenVPN with Windoze. Then I checked for Android, and that’s not the default. It looks like Android is IKEv2 only. Is there one single VPN server type I can configure on both Android 12 and Windows 11 in my router? Or just use OpenVPN on Windows and Android, and forget about their built in options?

If it matters, I’m using this while I’m on vacation for a few weeks overseas, and would like to have this up in case I run across a use case where I need a USA IP address.