Does homeowners insurance cover ant infestation?

You could contact your Insurance agent for clarification. But most homeowners insurance policies specifically exclude coverage for animal or insect infestations.

This type of thing is generally considered an expected home maintenance issue for which most homeowners have an annual service call from an exterminator service as part of the owners regular maintenance schedule.

You likely just need to call for your regularly Exterminator Service to come out and give you a service call.