First, this is perhaps because younger people nowadays are more likely to hear about the “greatness” of the Beatles before they actually hear any of their music. This is an issue with over-hyping certain bands/artists/composers (see also: Beethoven).

Second, the Beatles today are firmly music history, not music “present” (sorry Paul and Ringo). Young people may simply not care for historical pop music. The Beatles ARE a central touchstone for a lot of pop/rock, whether you like their music or not. I personally think their songs are better when other performers cover them 😂.