I use https://apps.apple.com/app/apple-store/id691121579 but the UI is very basic - it doesn't come with any filter lists, you need to point it at a hosts list like https://raw.githubusercontent.com/BlackJack8/iOSAdblockList/... manually. It's not compatible with other VPNs at the same time and it displays as a VPN in the top bar. Not ideal but