TLDR: We have post-session ending scenes and above table lore drops. I noticed they have a lot more for their favorite NPCs that doesn't expand on the players' PC lore and instead it's just because they love this specific character from a media.
Hi, I've been a player for a good few months now for this server I'm in and its in this place that I've gotten used to the whole post-session cutscenes of sorts. I'm an avid theorycrafter and notetaker for the stories of the PCs and I've come to notice that as the months move on I notice that some NPCs have more spotlight and story development than the player's characters themselves. I can give a range of the sessions total for the campaigns (60-80 sessions now.)
Is it normal for an NPC's story to be this developed compared to a PC's? Especially when the players have given a whole docs for their backstories too, so some of the DMs can't say they can't expand on the PC's lore in session or even for their loredrops. I've seen more loredrops about a couple of NPCs that anything to build on the lore for my fellow players' PC.
For a specific NPC, I've noticed that they're the DMs' favorite. 2 DMs love this specific NPC to the point that they isekai'd said NPC from one campaign to another and expect the players to love that NPC immediately when some of us players don't know this specific NPC. Inspired by one of their favorite media and is genuinely given special treatment. One of them even got mad when (above table) the party had jokes about said NPC when the PCs haven't met them at all yet for about 10 sessions I'm in (and still hasn't met till now by the way).
Let it be known that they're mainly writers, I give them the benefit of the doubt since being skilled in writing helps with DND homebrew worldbuilding... but I don't know.