Until Apple allows other browser engines, everything is still limited to the same set of blockers you can get in safari. None of them are remotely good enough compared to ublock origin. My current phone probably has around 6-12 months of life left in it, and if Apple doesn’t have a solution by then I’m dropping the iPhone and either going with a de-Googled android build or giving up on smart phones altogether.

Or Firefox Focus, which is what I use. It does a pretty good job.

Those are all using the same browser engine with the same limitations that ManifestV3 is bringing to Chrome. You're using it.