Linux on non-PCs/Laptops

Aside from Linux running on NASA hardware, phones and consoles. Does it run on ATM machines, PDAs and point of sale monitors?

I ask this because I've seen Windows being used in airport terminals and really old versions being used for cash machines as well. The crowdstrike problem made this more prevalent by seeing "non end user computers" using the OS.

Does Linux fill this niche as well do you know? I don't recall hearing any big name embedded distro used for those sorts of machines. Maybe Alpine Linux or NetBSD?

Thank you in advance for your input!