Cookie notices and ads are annoying. WKWebView supports a content filter, so I think we can find some sources to feed it.
https://developer.apple.com/documentation/webkit/wkusercontentcontroller/2902756-add
For cookie notices, probably this: https://fanboy.co.nz/fanboy-cookiemonster.txt
For ads, there are a bunch here: https://filterlists.com
Could do something like this: sindresorhus/capture-website#98 (see ghostery/adblocker#9)
This is a huge amount of work and will not happen soon
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