@Laura5333. Do you live in the house at different times as well as that appears to be the sticking point for many insurers.
Here in NSW IAG have the same restrictions, but they also have a stand alone business for holiday rentals called Sharecover which is like an extension policy and you can choose periods to cover on a pay per night basis.
Suncorp also owns Terri Sheer, which is who my owners use. They specifically have Holiday Rental insurance for building and holiday landlord (not just ordinary landlord which is a different policy) and the words Holiday Rental are listed on the property details schedule. Interestingly the underwriter is AAI.
Under loss of rent it is up to $1,000 per week but then says if permanent tenancy. I do not know any insurer who will guarantee to insure future holiday bookings, but I'm not an expert. The estimate is there because it has also been a long term rental. There are shortcomings.
.