I would try to not drive yourself crazy trying to guess what happened until you get that Techstream cable and get some readings from your system.
In the meantime, you can read through the other threads that had issues with air and not lifting after a flush.
I’ll be the first to ask: Do you have Techstream? If not, it’s imperative you have it as a LC with AHC owner. You’ll be able to see the pressures and any failures, codes, etc.
I haven’t heard many pumps failing, more often it’s the tubes rusting which you shouldnt have that issue.
Probably...