I can't speak for all of IBM -
- but it's fine. I'd say our opinion is have a perfect backout strategy if the OS upgrade fails.
ok... This comment:
"The following components are running on this Linux RHEL 7.9 server:
IBM Content Navigator 3.0.11
IBM Content Manager OnDemand 10.5.0.5
IBM Websphere Application Server 9.0.5.13 ND?"
This led me to believe everything is on the same server.... Sounds like you have a good distribution, so all is well. BTW: I just upgraded a server this week from 7.9 to 8.9. No issues. Your mileage may vary.