I find that this is tends to be the rule, not the exception and it's really reworked how I view things. I've started to almost (more jokingly than seriously) believe that the less novel something appears the more it actually is. The real mark for a good work seems to be "wow, how did you spend so much time on that? It's so fucking obvious" combined with "why has no one else done this?" But it is also easy to post hoc attribute something to being "well that's just x and y, so not really novel." But far too many things can be trivialized that way.
I wanted to say this because I think especially in engineering circles we have this wild novelty paradox. Where we can understand how our work, despite all outward appearances, is exceptionally nuanced and has minor details that are critical but when we judge others' works we don't consider such details. I think this is because most details are baked in when you learn of the new thing. But we got a good litmus test: is anyone else making/producing/doing this "super simple blatantly obvious" thing. If no? It's probably deceptively complex. (It's also why you should laugh at anyone who starts a sentence with "It's so simple, you just...")