I have no first-hand advice, but a quick Google search yielded
this article with some handy tips (I'm not being snarky about you searching the internet.)
This guy's #1 tip was to check the OBD reader.
-Is it a low-end one?
-Is the s/w out of date?
-Does it read all the codes for your specific mfr/model car?
But this is just me copying this guy's ideas. He has other suggestions as well.
He
did say that the light is coming on because the emissions are out of whack...you just don't know why yet.
As an aside, I have a Bluetooth OBD2 reader with software installed on a tablet. I've had the CEL light come on once in my 2019, and the codes were available. It was just a generic issue with the gas cap being loose.