There should be something in settings that says what firmware date it has.
That itself varies by manufacturer, so I’m uncertain where it would be menu wise.
Could even be a string of numbers on screen somewhere saying “V.date or version number here”
The player I grabbed for my girl years back has the latter, version is on lower corner of menu screen.
More recent ones I expect it to actually have an option in the settings somewhere to say what it has.
Great. I’ll check it out before returning it.