My tenant damaged a glass door, claims they did not do it but filed a claim against their renters insurance and got a settlement but never gave us the ,oney for the damaged door. Is this illegal

No, its not illegal. The question is was the door repaired and who paid for it? If you paid for the repair, then they owe you reimbursement and you can bill them for it. If they paid then, as lonf as the repair was properly done, you should have no issue.

Is the door fixed or replaced?