Standard way to express pledges for conformance resolution

It's not uncommon for VPATs to indicate exceptions and known WCAG violations for a given product.
This is a significant part of why VPATs exist in the first place, not simply a pass-or-fail certificate of conformance.
However, these noted exceptions and violations should preferably be accompanied by a pledge or estimated time frame for addressing the issue.
Firms may be reluctant to reveal such strategic information to the public, and for good reason, but it would be very good for clients/vendors to know that a product is due to have (say) its keyboard operation fully working by Q4 of next year.

What I'm wondering about is whether there is a way for OPAT to formally indicate a vendor pledge, or timeframe estimate, without this necessarily being a fixed legal commitment. Strategies and priorities change, so it would be good if this could be included, with appropriate legal caveats (expressing levels of confidence from "unknown", through "best guess" to "certainty").

I wonder if this legal groundwork were in place, vendors would be more prepared to be transparent and accurate in an OPAT