The problem with AI checkers and uni papers is that they're often poorly made, and then they need to account for any sort of citation that might be involved with the paper. I'd not be feeding my data into one, while it's easier depending on the degree it's best to simply adopt as unique a writing style as possible rather than stressing out over that stuff. I wouldn't be surprised if one ate the things being uploaded, only for the data to then be used to claim plagiarism was involved when later checked.
What is really sad is that it's relatively easy to use something like Chat GPT to write essay's in some fields, and an hour of two of editing can actually make it look valid if the person is smart about it. It's neo-copying your friends homework style stuff, I know people that have had well graded papers at the college/uni level while experimenting.