The very first account on a new M1 or T2 equipped Intel Mac would have a Secure Token. Any account created with that initial administrator account will also have a Secure Token. But if accounts were restored via Migration Assistant or otherwise restored from backup they might be missing it and won't be able to boot the Mac among other problems.
If you attempted to boot from an external drive to re-install macOS that's not going to work with M1 Macs very well. In fact, booting from an external disk entirely isn't exactly possible anymore. Apple uses the internal disk in such a way that if that internal disk was erased you wouldn't be able to boot anything from an external drive due to the security changes. The internal disk has to be working and in good condition in order to boot externally. Apple also removed Internet Recovery on the M1 Mac's.
If the internal disk is erased then you may be in a Catch-22 scenario where you need a second Mac with a USB-C data cable to connect to a second working Mac with Apple Configurator 2 installed. Then you can use that second Mac to revive or reset the first broken M1 Mac. It basically downloads the recovery partition, etc. onto the M1 Mac with the revive option or re-installs everything including macOS with the reset option.
Support at an Apple Store might be required if you do not have a second Mac. Or perhaps a 3rd party Authorized Repair Center or a vendor that supports Macs. They just need to attach a USB-C Thunderbolt data cable and run Apple Configurator 2 on a second Mac on your behalf to get things working again. Then you can restore from backup if you have a backup.