Well as a PM who on the last 4 legs this past 2 weeks ended up on the list as the following don’t expect the upgrade to happen.
number 1 of 29 with 3 F seats (ended up being
#1 on the upgrade list too and got it at the end. Trust me I was surprised not one DM was on my weekday afternoon business heavy (normally) flight
23 out of 78 for 0 F seats
11 out of 49 for 0 F seats
19 out of 47 with 0 F seats
FO upgrades exist though I got it on LGA-ATL earlier this year when I was still an FO at the 24 hour window. Fun fact it was such a medallion light flight the GA and FA spent 10-15 minutes trying to figure out who would get the last empty F seat. (Went to a women who split the PNR from her husband so she could get F)