I’ve heard various stories about DCT’s thinking here. It seems the company just doesn’t care about its archive in any meaningful sense, beyond appealing to very specific markets. So it’s digitised all the old Beano annuals, so you can buy a copy for the year of someone’s birth, and it’ll churn out reprint Dandy strips for summer specials, but there won’t ever be a phonebook of Bananaman (say).
In a sense, that’s why it’s so great to see The Phoenix routinely lobbing stuff into the wild in collected format. Not everything ends up in those wee books, but you do get a reasonable selection of its best bits.