Second up, one bit of install management change to be aware of. The old License Manager is gone. The subscription products use and depend upon a small app called Adobe Creative Cloud Desktop App. (ACCDA)
The ACCDA is used to install, update, activate, deactivate, and accredidate the various programs. You sign into it, you leave that sign in alone, and you let it run. Do not remove it from startup. If you sign out, then the programs get deactivated. To activate them, sign back in.
Typically, you no longer login via the Lightroom Classic program, typically you do not look fir updates via the Lightroom Classic program. That is now all done via ACCDA.
The ACCDA communicates when you have internet access with the Adobe servers to check fir updates. Occasionally (every 90 days or so???) it will authenticate your subscription with Adobe . Hence some small services are running in the background.
Just another Adobe customer; My Sys; APP: LRC 10.0, PS 22.0; CMP: WIN WS 16GB OS 10 v1909 (18363), mid 2015 MBPr 15” 16GB MACOS 10.15.7; 4K EXT DSPY; CAM: Canon 5D Mk III, Fuji X-T3