If you have the missing firmware warnings similar to below, you can try this.
update-initramfs: Generating /boot/initrd.img-6.9.7+bpo-amd64
W: Possible missing firmware /lib/firmware/rtl_nic/rtl8126a-2.fw for module r8169
W: Possible missing firmware /lib/firmware/i915/mtl_gsc_1.bin for module i915
W: Possible missing firmware /lib/firmware/i915/dg2_huc_gsc.bin for module i915
W: Possible missing firmware /lib/firmware/i915/mtl_huc_gsc.bin for module i915
W: Possible missing firmware /lib/firmware/i915/mtl_guc_70.bin for module i915
1) Get firmware files from git repository
git clone https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git --depth=1or alternative, only required files from
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/
2) copy the files download in (1) to corresponding path, e.g.
rtl8126a-2.fw => /lib/firmware/rtl_nic/
mtl_gsc_1.bin => /lib/firmware/i915/
3) Run update-initramfs -u again. Warnings should be gone this time.
