Macintosh HD & OS recovery

I purchased a 2020 MacBook Pro A2289. As I was setting up Find My, the sellers email was still in there. I messaged to seller to please remove her email (yeah, I’ve since learned the hard way that it’s more involved than that). I was happily transferring my files from my old MBP when BAM! the new one shut down and restarted in recovery mode. What?! I’m wondering if her removing deleting her email in Find My rather than going through Utility Disk, somehow put it in Stolen Mode, thus, deleting theMaci. HD drive. This was last week Wednesday 3/26/25. I found the would be solution in this community- and while it worked for the person who asked for help with this same issue, sadly, it did not work for me. Perhaps it’s because I’m using my personal Hotspot? The A2289 is popping up a message that a WPA password for this network is required. This is what I did via the instructions. Utility Disk MACINTOSH SSD [alpha numeric string] > ERASE> Disk Name: I typed MACINTOSH HD> next line auto populated four letters I cannot remember now- AAFS? left as is per instructions and the last field was already filled- I did not change it per instructions. > confirmed ERASE? and poof! This part worked! Back to main recovery option screen>Reinstall MAC OS >Continue aaaaand…nothing.

Try a restart, get another pop up selection box: Choose Startup Disk but the box has no selections.

Where do I go from here?? Thank you so much for the time and help. Julie