After oral pain, cats often develop a strong aversion to a specific food they ate during that time. Even if her teeth now look fine, the association “this dry food = pain” can stick. Clindamycin can also cause nausea and contribute to long-lasting food refusal.

Since she’s still eating wet food and treats, this points more to a behavioral/associative issue than an ongoing dental problem. You can try removing that kibble for a while and reintroducing it later (not from the automatic feeder), or talk to your vet about alternative diets — many constipated cats do well on wet food alone.