This is from the Athletic so no doubt maybe behind a paywall. But it is long and comprehensive.
www.nytimes.com
But this was interesting and cut and pasted it from the article:
The last five drafts include players from the 2015 through the 2022 recruiting cycles. Only one of the top 15 programs in terms of producing NFL talent over the last five years ranked outside of the top 25 when it came to average recruiting class rankings: South Carolina, which still ranked in the top 30.
What’s far more impressive from a development standpoint are the Power 4 programs that ranked outside of the top 40 in recruiting rankings yet produced NFL talent at a top-40 level.
The Pitt Panthers top the list among those schools with 20 draft picks over the last five years, including two first-rounders — second most in the ACC behind Clemson (22). Of those 20 picks, only three were transfers, and among the 17 homegrown talents, only one was a blue-chip recruit coming out of high school (safety Damar Hamlin).

What the last 5 years of the NFL Draft tells us about college football recruiting
Do stars still matter? Which states produce the most NFL Draft picks? How many first-round draft picks transferred while in college?

But this was interesting and cut and pasted it from the article:
The last five drafts include players from the 2015 through the 2022 recruiting cycles. Only one of the top 15 programs in terms of producing NFL talent over the last five years ranked outside of the top 25 when it came to average recruiting class rankings: South Carolina, which still ranked in the top 30.
What’s far more impressive from a development standpoint are the Power 4 programs that ranked outside of the top 40 in recruiting rankings yet produced NFL talent at a top-40 level.
The Pitt Panthers top the list among those schools with 20 draft picks over the last five years, including two first-rounders — second most in the ACC behind Clemson (22). Of those 20 picks, only three were transfers, and among the 17 homegrown talents, only one was a blue-chip recruit coming out of high school (safety Damar Hamlin).