Macbook Pro 2019 keeps crashing after formatting Time Machine drive with APFS

You are having kernel panics, but what you posted was not a panic log, so is of absolutely no use except to the person at Apple that wrote the code that crashed.

There's not much to find in a panic log. Primarily I'm looking for third-party kernel extensions loaded when the panic occurred. The two predominate causes of a kernel panic are third-party kernel extensions and hardware faults. Sometimes, the particular hardware might be hinted at in the log, but for the most part you can't determine absolute cause from the panic log.

If there are third-party kernel extensions loaded at the time of the panic, you would uninstall them and see whether the panics stop.

EtreCheck will tell you if you have kernel extensions installed, but not whether they were loaded at the time of the panic.

Look for a panic log in /Library/Logs/DisgnosticReports/

The name will begin with “Kernel”

Open it, copy the text, and paste into the Additional Text area, here (document icon in toolbar).

If it is something else causing the panic, the log may give us a hint.

That isn’t a kernel panic, so it is of no help determining if a third party kernel extension is at fault.