1. Yes, it is likely when it tries to submit to Xerox.
EWS > System > Remote Services upload (Click Settings to verify the time it attempts)
If the time there is different, verify the printer knows what time it actually is
EWS > System > Date & Time
2. Yeah, it can be shut off
EWS > System > Defaults and Policies
If needed, EWS = Enhanced Web Services which is just the web interface used to setup the printer, so take any browser that isn't Chrome/Edge (Chromium has serious issues with Xerox devices) and put the printers IP address in the address bar to access it.
1- The printer briefly wakes up from sleep every day at 8:19 a.m. Is this normal?
2- The printer prints a page each time the power is turned on. Can we avoid that?