try:
Enable Pre-released updates (focal-proposed) in the "Software & Updates) $sudo apt-get update $sudo apt install linux-image-unsigned-5.13.0-1005-oem
try:
Enable Pre-released updates (focal-proposed) in the "Software & Updates) unsigned- 5.13.0- 1005-oem
$sudo apt-get update
$sudo apt install linux-image-