Yes.
Certainly WotC ones.
The whole "mining ideas" thing for D&D is usually pretty silly, in my opinion, like, unless you just aren't a person who thinks of adventure ideas, or are pretty new to RPGs/D&D. I can "mine" more ideas by watching a single episode of a SF/fantasy show on TV (especially some anime, interestingly) than I can by reading an adventure, and they're usually better ideas too. Frankly WotC has zero top-flight adventure designers right now.
I used to buy WotC adventures but WotC stopped making "finished" adventures in 5E. In 3E and 4E, WotC adventures were just mostly crap (with some notable exceptions), but they tended to be complete. In order to run them, you needed to read them through once, and make some light notes, maybe a few small tweaks. With 5E, virtually all WotC adventures, certainly the "adventure path"-style ones are just incomplete, and they're very poorly written too, with terrible organisation. The key audience seems to be people who don't seriously intend to run the adventure, rather reading it for pleasure almost like an incredibly bad fantasy novel. Not all of them are worthless - Strahd is pretty okay - but the vast majority require so much effort to make them actually run that it's barely less effort than working from scratch (for me at least), and if there's one thing I have absolutely zero problem with, it's coming up with adventure ideas for broad fantasy or SF stuff. I mean, I came up with an entire sci-fi campaign with two dozen major NPCs, loads of plot points, alternate ways things to go, over a weekend a few months ago - I just kept typing and coming up with ideas.
I still buy adventures from non-WotC sources sometimes, if I know they're going to be well-made, double-especially if it's for an RPG I don't naturally think in the style of (like complicated intrigue/wheels-within-wheels stuff, that doesn't come naturally to me), but D&D I got covered, thinking-wise.
Re: Radiant Citadel, yeah, maybe I am missing out, that could be. Those designers are newer and might have fresher ideas, and short adventures like that usually are complete, unlike WotC's longer ones. But Radiant Citadel is extremely heavily themed to a pretty wild theme. Usually with short adventures, I want them because I can drop them in for a session I didn't have a chance to prep for, or because I don't want to do the work for a week, or just for something different. With Radiant Citadel my impression was that's not really what those are for.