Not sure where they got their numbers ... but they do not match up with what the NCAA reports (not even close):
The 2026 NFL draft has come to a close after 256 college athletes were selected across seven rounds. Here is a complete breakdown of the number of draft picks by college.
www.ncaa.com
Perhaps they dug a bit deeper and included players who had spent some time at G5/FCS/etc programs before moving to the P4 where they were actually drafted from. Even if you accept their number, it's a sad showing from among over 250 picks. The lesson is pretty clear: Compete at a P4 program or you have little more than a 10% chance of getting drafted.