Hi @ppBBB , the kernel meta package for 4.19.x might be installed, check with:
debian@bbb-pwr01-ser09:~$ dpkg --list | grep bbb.io-kernel
ii bbb.io-kernel-4.19-ti-am335x 1.20220416.0-0~buster+20220416 all BeagleBoard.org 4.19-ti for am335x
ii bbb.io-kernel-tasks 1.20220416.0-0~buster+20220416 all BeagleBoard.org Kernel Branche
If you want to switch to v5.10.x or one of the others just do:
sudo apt update
sudo apt install bbb.io-kernel-5.10-ti-am335x
sudo apt remove bbb.io-kernel-4.19-ti-am335x --purge
sudo reboot
Regards,