I stumbled about an article from “Wired”, where Horowitz recommended your router: https://www.wired.com/story/apple-ios-vpn-data-leak/
My problem is that I have difficulties to find compatible routers for your firmware in germany.
Do you think that “TP-Link Archer C7 v5” would work? You are only mentioning “TP-Link Archer C7 v2”: