So my reservation on the ANA app (I booked through ANA) shows that my PP upgrade from C>F on NRT-LAX has cleared (i.e., I only have the F segment in the itinerary; I no longer have a J segment with a separate O segment waitlisted). I was also able to select a seat (1K on "The Suites" 773). So all seems fine. But, I never received a confirmation email from UA (ccntra to what the UA PP upgrade page says will happen once I clear), and the corresponding reservation on the UA app (I have LAX-IAH on UA after the NRT-LAX flight on ANA) still shows two segments for the NRT-LAX ANA flight -- the first segment still says business, but the second segment, which appears out of order at the end of the reservation after LAX-IAH, says first (although it no longer says waitlisted as it did before).

So am I in the clear (no pun intended)? It seems I should feel confident in what the ANA app is showing, despite the still-somewhat-confusing picture on the UA app.