There are some notes specific to rpi installs, so give it a read if you run HAOS on that platform.

Raspberry Pi 5 users need a bootloader from at least 2025-02-12, otherwise the display output may freeze early during the boot. Update the bootloader before installing this update, using one of the following methods:

• Run rpi-eeprom-update -a while connected directly to the device (using a display and keyboard), prior to installing the OS update.
• Use Raspberry Pi Imager with a spare SD card to flash a bootloader update image to it.
• Alternatively, if you have an SSH terminal app installed, you can run ha os boards raspberrypi firmware update over SSH right after updating the OS.