I did a test on focal platforms, I found this issue was not fixed yet.

By default user used oem kernel which is set by oem-meta packages, it will be ok, but if the user select the generic kernel, then it will meet black screen issue cause of missing nvidia driver.

Start-Date: 2023-05-31  06:04:11
Commandline: /usr/bin/unattended-upgrade -v
Requested-By: u (1001)
Install: linux-hwe-5.15-headers-5.15.0-73:amd64 (5.15.0-73.80~20.04.1, automatic), linux-headers-generic-hwe-20.04:amd64 (5.15.0.73.80~20.04.34, automatic), linux-modules-extra-5.15.0-73-generic:amd64 (5.15.0-73.80~20.04.1, automatic), linux-image-generic-hwe-20.04:amd64 (5.15.0.73.80~20.04.34, automatic), linux-generic-hwe-20.04:amd64 (5.15.0.73.80~20.04.34, automatic), linux-modules-5.15.0-73-generic:amd64 (5.15.0-73.80~20.04.1, automatic), linux-headers-5.15.0-73-generic:amd64 (5.15.0-73.80~20.04.1, automatic), linux-image-5.15.0-73-generic:amd64 (5.15.0-73.80~20.04.1, automatic)
Upgrade: linux-image-oem-20.04d:amd64 (5.14.0.1032.29, 5.15.0.73.80~20.04.34), linux-oem-20.04d:amd64 (5.14.0.1032.29, 5.15.0.73.80~20.04.34)
End-Date: 2023-05-31  06:04:45

Start-Date: 2023-05-31  06:18:38
Commandline: /usr/bin/unattended-upgrade -v
Requested-By: u (1001)
Remove: linux-image-oem-20.04d:amd64 (5.15.0.73.80~20.04.34)
End-Date: 2023-05-31  06:18:38

Start-Date: 2023-05-31  06:18:42
Commandline: /usr/bin/unattended-upgrade -v
Requested-By: u (1001)
Remove: linux-headers-oem-20.04d:amd64 (5.15.0.73.80~20.04.34)
End-Date: 2023-05-31  06:18:42

Removing linux-headers-oem-20.04d (5.15.0.73.80~20.04.34) ...
Packages that were successfully auto-removed: linux-headers-oem-20.04d linux-image-oem-20.04d
Packages that are kept back: 
Package libnvidia-cfg1-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package libnvidia-compute-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package libnvidia-decode-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package libnvidia-encode-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package libnvidia-extra-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package libnvidia-fbc1-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package libnvidia-gl-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package linux-modules-nvidia-510-oem-20.04d is kept back because a related package is kept back or due to local apt_preferences(5).
Package nvidia-compute-utils-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package nvidia-driver-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package nvidia-kernel-common-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package nvidia-kernel-source-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package nvidia-utils-510 is kept back because a related package is kept back or due to local apt_preferences(5).
Package xserver-xorg-video-nvidia-510 is kept back because a related package is kept back or due to local apt_preferences(5).