Just here to say, you are absolutely correct, and I’m glad you found out you weren’t blocked!!
iMessage to iMessage only: Prior to the new update, it would not say delivered if I was blocked. It would send as a text message (green). For example: I was blocked over a month ago by someone, and last week I sent them a message to see if I was still blocked (it’s a young, close family member and I had heard they weren’t mad anymore).
To my surprise, the message went through, and it was blue/said delivered. Before I got excited, I googled and found an article from a reputable source that said after IOS 16.5 it will likely still say delivered, even if you are blocked. This was so discouraging. I didn’t call Apple or anything, I just let it go and assumed I was still blocked.
A few hours later, the person responded. So I was obviously not blocked anymore.
Moral of the story: if your message is blue and says delivered, you are not blocked. Regardless of the IOS.
I just wanted to put this information out there, because so many people here clearly did not understand what you meant.