On my Pixel I just set Private DNS. Yea I had to setup a SSL certificate but that's easy to do. So when I leave home, I still use my Adguard server for adblocking.

I could do the same with "vanilla" DNS (udp port 53) as well, but I don't.

Pihole can't, easily, do Dns vis TLS/QUIC etc without 3rd party stuff being bolted on etc. Adguard Home is a single binary, it's great.