There's a few notable differences between android and iOS as far as adblocking is concerned:

1) Android lets you install other browsers and use them as default. Some of these, like Firefox or Brave or Vivaldi, include adblocking software that works everywhere, even YouTube. Whereas on iOS, even if you install chrome, it's just a reskinned safari because Apple refuses third parties proper access to the system. https://www.howtogeek.com/184283/why-third-party-browsers-wi...

2) Android allows you root access without too much trouble, and you can install system wide ad blocking tools that way. Such as AdLock.

3) There are other system wide blocking options, such as anti-ad VPN solutions, that works on system wide data traffic.