Gabe Brown has been doing regenerative agriculture for over two decades on Brown's Ranch, over 2000 acres, in Bismarck, North Dakota successfully. Food crops plus cover crops plus livestock, all integrated. Lot of good results compared to neighboring farmers doing the traditional synthetic fertilizer / pesticide / tilling / monoculture approach.
There are others like him too.
And he's been invited to and giving a lot of talks about it at many confs for years:
Watch "Treating the Farm as an Ecosystem with Gabe Brown Part 1, The 5 Tenets of Soil Health"