debian@BeagleBone:~$ dpkg --list | grep generic-sys-mods
ii generic-sys-mods 1.20210809.1-0~bullseye+20210809 armhf System tweaks for the Generic Systems
Console
sudo systemctl enable regenerate_ssh_host_keys.service
sudo reboot
#Key's get regenerated before SSH becomes active again..
New in Bullseye, but i'm going to backport it:
Console
https://github.com/rcn-ee/repos/blob/master/generic-sys-mods/suite/bullseye/debian/generic-sys-mods.regenerate_ssh_host_keys.service
Thanks! ;)