Is there a standard way to generate P2PK receive addresses?
No.
Aren't 1-prefix addresses just for P2PKH?
Yes.
BTW, a few posts were deleted from this thread, which happens a lot on the forum. How come?
A lot of them are spam or low value. I will delete posts from people who clearly do not read the thread and just post the same thing that someone else posted earlier in the thread.