I know of three 7.3's that have been replaced or rebuilt.
The first was a 2020 tremor and he had a hassle getting it done at 60k miles.
Another is a 21 that's a plow/lawn truck. They swapped that without too much hassle.
My brother takes care of the ambulance fleet at the f.d. and they just had one rebuilt by the dealer because a motor was a ten week wait. That truck is a 450 and it has 40k miles on it.
My brothers personal truck is a 22 with 15k and no issues yet.
I don't think know if the problem has been solved or if Ford is just swapping motors.
I delt with a oil consumption issue on a 2018 5.0 in my wife's f150.
They changed the dipstick and said "we'll monitor things". It had a 100k warranty and I just poured oil in it regularly and traded it in right before the warranty was up.