My institution shows an unclear or negative ANABIN recognition status; will a strong dMAT score fix that?

No, a strong dMAT score will not fix an unclear or negative ANABIN recognition status. The two are separate issues, and no aptitude test result can compensate for a degree from a non-recognized or ambiguously recognized institution.

Why the dMAT cannot help here

If your institution shows H+/-, H-, or an unclear status on ANABIN, that has its own separate resolution path and needs to be checked and addressed independently. A strong dMAT score cannot compensate for a recognition problem in any way.

Check ANABIN before you register

Check your university's ANABIN status before you even register for the dMAT, since the status is a more fundamental gate than your aptitude test score. Resolving a recognition issue is a prerequisite, not something a good score can work around.

My Advice

Check ANABIN first, before spending a single hour on dMAT preparation. If your institution's status is unclear, resolving that is a more urgent priority than any test score, since no dMAT result can override a recognition problem.