@jj I use both AdGuard and AdGuard Pro on my phone currently.

AdGuard adds filter lists locally, so if you only use it as a Safari content blocker it's entirely local. They have an optional premium subscription that will route your DNS through their servers, yes.

AdGuard Pro also does filter lists locally, and has a DNS "VPN" built-in. Notably, while AdGuard's DNS servers are the default, you can choose to use any DNS servers you'd like, including OpenNIC, or even custom DNS over TLS servers!