There is also a bcm27xx-eeprom package available which contains the rpi-eeprom-update script + firmware files up to 2022-04 https://openwrt.org/packages/pkgdata/bcm27xx-eeprom
root@router:~# rpi-eeprom-update
BOOTLOADER: up to date
CURRENT: Tue Apr 26 10:24:28 UTC 2022 (1650968668)
LATEST: Tue Apr 26 10:24:28 UTC 2022 (1650968668)
RELEASE: stable (/lib/firmware/raspberrypi/bootloader/stable)
Use raspi-config to change the release.
VL805_FW: Using bootloader EEPROM
VL805: up to date
CURRENT: 000138a1
LATEST: 000138a1
In order to update to latest release 2023-05-15:
Would it be possible to download latest pieeprom + vl805 from https://github.com/raspberrypi/rpi-eeprom/tree/master/firmware/stable and put this into /lib/firmware/raspberrypi/bootloader/stable/
Or should I wait for a new bcm27xx-eeprom package?