[ndsipa_pomu]

Various VPN services provide ad blocking and a phone app e.g. Mullvad

[Scoundreller]

It’s not perfect, but carefully choosing DNS resolvers/profiles can get you a lot of the way there.

Even Mullvad ad-blocking DNS is available for free, no app (and def no account!)

https://mullvad.net/en/help/dns-over-https-and-dns-over-tls

Nice thing is you can set your DHCP to hand this out to all devices.