Have had the AirPods Pro 2 for about a week. Of course they are not hearing aids, but I find they do help me hear better, even if I don’t have my iPhone with me.
For example taking a walk, I just hear ambient sounds better, even my own footsteps. But normally I carry the phone to stream music or ask Siri dumb questions. 
They really help my hearing on the phone and it is nice to have my hands free while yaking on the phone.
I seldom use the Noise Canceling mode but it is great when I do, such as running a vacuum or using a power tool.
Personally, I have had no problem with the occlusion effect. On a scale of 1 to 10, I would say they help my hearing about a 3. It is simply unrealistic to expect them to perform like a $3000 pair of hearing aids.
No one mentioned the Live mode. I haven’t used it other than to try it out, but can see where it could be useful, say at a lecture where you could place your phone near the speaker.
Overall, I am pleased with them.
If you are thinking about trying them, I would strongly recommend you buy them from a source that accepts returns if you decide they aren’t for you.
Comments:
I had one fall out while shopping, but luckily spotted it right away. I read that almost 20% of owners lose one! So I bought the below lanyard. Don’t plan on wearing it except at times I think I may be distracted. Have to remove it when placing in case. Also, have to tell Siri to adjust volume since it covers part of the stem.
Someone wanted to manually input an audiogram. If you try to upload a non audiogram photo, it will give you an error message and give you the option to enter data manually.