Need to resolve -Data problems reported in First Aid? And How?

A few days ago went from Catalina to Big Sur 11.2. All looked well.

Yesterday decided to check Macintosh HD from admin user with Disk Utility > First Aid. Reported lots of errors and finally froze part way through.

Then ran it from Recovery for -Data Still get many error messages such as "error: Cross Check : Mismatch ...". But the final message is "File system check exit code is 0." And, a cursory check does not show anything amiss.

Nothing indicated in the log within recovery that fixes were made. To check, I ran First Aid again from my user, it did show the same messages but failed as before.

So are these issues innocuous? I did also check the system volume within recovery and it had no errors.

DriveDx shows no issues for the drive with their overall rating of 97%.

Should I let this go or reestablish the data volume from yesterday's backup? Or would a complete erase and rebuild be needed to finally resolve this?