If someone blocks you're number on iPhone will your message say delivered?

I remember In October when my friend blocked my number (we had a fight) he has an iPhone 7 and I have an iPhone 6… I upgraded my phone software after that. But at the time my messages did NOT SAY delivered…

Now I texted him randomly and my message said DELIVERED… Does that mean he unblocked my number?! Because I hear now that sometimes it will say delivered even when they blocked you. But from my experience it didn't say delivered

Yes. It will at least if you are sending from an android. I'm not sure about iphone to iphone but i would asume it would say sent.