But you may have used the Palm OS successor, webOS, which is used by LG smart TVs. It blew me away that Palm OS is still around in some form. https://en.wikipedia.org/wiki/WebOS
It's available on a few devices (I have it running on a pinephone; also tried running on a galaxy 4 but got stuck in a boot loop). The wiki is a bit out of date, but there is an active community on their IRC [1].