One thing I've noticed is that content-blockers/adblock don't seem to work within the Facebook/Instagram etc. in-app browsers so I usually end up jumping out of them anyway.
Content blockers only work in Safari and SFSafariViewController.
The worst is when the link is YouTube and I have to watch an ad even though I pay for YouTube Premium but because it launched in an app browser I'm not logged in.
Yup same. I jump out as soon as it attempts to load and I have the ability.