Your description does not allow for the judgment you are looking for. Labs will always make you believe that there is a hope for recovery.
You won't get around finding a specialized recovery lab and pay them their fixed examination fee if that is part of their business model.
Edit: 12.5.2023 14:00
According to Joep von Steen many labs offer free diagnostics. As he should know better than me, you obviously can get free diagnostics.
Major labs like Kroll Ontrack are in a position to charge you a diagnostic fee. Smaller labs, probably desperately fighting for business may not charge such a fee.