That's what I expected.
And that is a HUGE no-no! Seriously, and for good reasons.
Because that folder is expected to be the exact duplicate of the same folder in AfterEffects and MediaEncoder. By the three applications.
Which have been encoded to access LUTs from their included folders by relative location in the computer alpha-numerically sorted folder. Not by LUT name!
So they only see them as ... say, you applied the 10th LUT down. But then you add a LUT with an A initial letter ... so the LUT you applied previously is now the 11th LUT down. Oops, the program now applies the one before the one you expect.
They have a chart on their Help files for LUTs, get used to checking their Help on such things. There are two locations each, in PCs and Macs, where you can store your files. Even by whether you want them to particular users on that computer.
I use Program [package] files/Adobe/COMMON/LUTs as the general location. Within that, you create the Technical folder for Basic tab use, Creative folder for Creative tab use, and Input folder for color management Input LUT use.
And put your LUTs in the appropriate folder for where you will be using them in Lumetri.
Now, they will be seen by name across all three apps.
Neil