The list of modules to include in the initrd is not under the kernel's
control but ubuntu-core-initramfs. This commit should fix the issue:
https://github.com/snapcore/core-
initrd/commit/fa088d26aded1a8c8ce9910ccdb81ba99ed976c4
** Also affects: ubuntu-core-initramfs
Importance: Undecided
** Changed in: linux-raspi (Ubuntu)
Status: New => Confirmed
** Also affects: linux-raspi (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-raspi (Ubuntu Hirsute)
Importance: Undecided
Status: Confirmed
** Also affects: linux-raspi (Ubuntu