Again, you don't understand what is going on in the football portal. Did you read the article from 24/7 that I linked? In the 2019/2020 transfer cycle, only 27% of P5 transfers ended up at another P5 school and only 53% of P5 transfers ended up at an FBS school. The 2020/2021 transfer cycle is looking like it will be much worse outcomes for P5 transfers due to the sheer volume of transfers.
As for UConn transfers over the past 2 years, according to 24/7, there have been 28. This is about average or below average relative to FBS schools. For local schools, Rutgers has had 30, BC 25, Syracuse 22, Maryland 35, Penn St. 27, Virginia Tech 33, UMass 29, West Virginia 32. Some other schools I looked at: Nebraska 38, Michigan 32, Florida St. 30, but the most surprising numbers come from the top 3 P5 football programs with Ohio St. at 9, Clemson at 11, and Alabama at 21. In other words, the top recruits are willing to stay at the top programs if they are winning even though they may be on the bench.