I was one of the people who successfully completed the medical check by submitting the webform with information from my previous health check (from my visitor record). I included my IME# in the submission, and a few days later, it was updated as "completed" on my PR application tracker back in December 2023.
I was also one of those who didn’t receive the P1 email, despite IRCC confirming over the phone that it had been sent to me and they told me to wait for it to be resent again. After waiting for a few weeks, I decided to proactively send the information typically requested in P1 to the immigration email. A week later, I received P2, and then another week later, I got my eCOPR. Now, I have my PR card.
I'm assuming you sent the IME + Medical details only after you were requested for a medical... You didn't proactively send a medical?