My company operates/ed a job board and a staffing business. Both ran like traditional job boards (Indeed, Zip Recruiter, etc) and staffing companies (Kelly, Adecco, etc.), except being focused entirely on the formerly incarcerated. This is how large employers source many, many employees.
The staffing business was much larger. In this model, we serve as the hirer-of-record, and essentially lease out the workers to our client employers, who cover all our costs (wages, unemployment insurance, taxes, etc.) plus our mark-up (profit). It's a high volume, low margin business.
During the Great Resignation, we found it took 10x the time and effort to get someone placed, eroding our already thin margins. Plus, if a worker left (which they began doing at a great rate), we're obligated to replace them. All of this made it pretty much impossible for us to make money. (Again, we're a for-profit business). I hope this clarifies things.
Where do you think they went? If they mostly went to work elsewhere because as part of the "Great Resignation" because they found better opportunities, then perhaps you accomplished your social mission (which was presumably giving them a foot in the door of gainful work), even if it was at the price of the business.
Maybe structural impediments to employment for felons came down due to a tightening labor market?
For example, in CA, laws are being passed to allow formerly incarcerated wildlands firefighters to work in that job after release:
https://leginfo.legislature.ca.gov/faces/billTextClient.xhtm...
If they resigned instead due to hopelessness and falling back through the proverbial cracks of society, that's a terrible result.