I honestly don’t know what exactly irony means.

unironically = sincerely/earnestly

Right; I wasn't playing grammar gotcha. I use my laptop for non-work activities, and I guess I do so sincerely. Do people use their laptops or desktops for non-work activities somehow insincerely?

Sure, for example as a last resort when your phone or whatever has died, but the charger is over there, ugh.