@Mike-and-Jasmine0 You need your own insurance even for Airbnb rentals. Aircover only covers the property when guests are there. If the property is damaged when they are not or damaged through no fault of the guest then Aircover does not apply. Additionally the fact you are doing STR means a normal policy is likely invalidated even when there is not an Airbnb booking.
I would advise going to a broker as they can often access policies not available direct to the public.