It is, but the Boardwalk isn't really a place for kids and I would assume that's the vast majority of guests at Pop Century and Art of Animation and probably Caribbean Beach, too. Not that isn't the majority of guests at WDW period, but I would think it's an even higher percentage at those resorts.
Jellyrolls is the one of (and probably the) best night time activities for adults anywhere at WDW and probably has been since Pleasure Island closed, and Flying Fish is one of the best restaurants on property, but it doesn't seem to have made the Boardwalk any more popular.
To be fair, though, there's honestly not that much to do there. You have a few restaurants, a bakery that sells essentially the same stuff as everywhere else at Disney, Jellyrolls, and the dance hall, along with a few shops that don't really offer any special reason to visit. They did have some streetmosphere too, but who knows if that will come back post-COVID.
If it was up to me, they'd go more heavily into the turn of the century boardwalk theme and build some shops and an ice cream/candy store that actually look like they belong in that time period (they actually had the latter at one point but closed it). There needs to be something else to attract guests and theming is the best way to do it at Disney World. If you're not offering anything unique for sale and the shops themselves look generic, there's just no draw.
