Thanks for the update.

For what its worth, we used the Ellume home test (also FDA approved for entry into the US) I bought ours on Amazon a few days before our trip and got them day we left - almost left without them since the package hadn't arrived and we were heading to spend the night at the airport. Amazon truck pulled up as we were leaving so we grabbed them. Scheduled the test for our son online a couple days before we needed to take it. Day of the test, I realized it would be easier to get it done a little earlier, still within our 72 hours for PR requirements. Rescheduled it for 10 mins from current time. Got on the app, did the video call and took the test. 15 mins later we had our results. Very easy. Only thing that would have saved a little time was watching a video ahead of time. But the Azova rep (proctor company) just sent me the link and called us back 5 mins later. Seems like their wait time is much better - probably helps with scheduling the appointment.