Also never have that feeling anymore that my phone is spying on me.
I'm using NextDNS for DNS level ad blocking as well as iOS built in tools, and I get ads for women's hygiene products (I'm male), travel, dining, server parts, cars, and everything in between.
The main difference between Android and iOS is (or used to be?) that Android typically phones home with everything, frequently visited locations, calendar appointments, voice commands. On iOS most of that runs on-device. Siri voice to text/text to voice runs on device, various "ai" things in photos runs on-device, frequently visited locations are device local.
GrapheneOS has zero ads in the OS and main services.