Putting this here for posterity. Just updated an HP Elitebook x360 1040 G5 laptop to Ubuntu 25.04.

I used the recommendation here which has resolved an issue where the only sound device was Dummy Audio:

BANG & OLUFSEN speaker no sound on Linux Mint 21.2 on HP ENVY 17 https://forums.linuxmint.com/viewtopic.php?t=416746