I don’t have a name for it but excessive idle scrolling without purpose can be considered a deactivating behavior and may contribute to depressive states. It generally does not give us a sense of accomplishment or happiness.

It’s not a horrible thing to engage in of course but it’s all about moderation and context. 10-15 minutes on your break? Probably not the worst thing. 3 hours after work? Maybe not the best but for some people maybe helps wind down. 3 hours right after you wake up? Probably not a great idea, setting a bad momentum for the day. But all of these as isolated incidents? Not a huge issue. All of them happening regularly? Maybe look at replacing them with something that makes you feel more of a sense of achievement or at least feels intentional and see how that impacts your mood. Might be more drastic than you’d think