@John850 Yes, my brother lives in Oz, in NSW, so I am at least a bit aware of how things are going over there. And Canada is basically the same. While there are some federal rules, like not being able to enter the country without being vaxed or showing a negative PCR test (and going into 14 day quarantine if you aren't vaxxed), the individual provinces make their own decisions about lockdowns, vax requirements for certain jobs or activities, etc.
Or you can have it the other way, like here in Mexico, where there are almost no regulations, and Covid is raging and they have one of the highest Covid death rates in the world.
I prefer the extreme precaution route myself, even though it's inconvenient and often financially difficult.
When guests send inquiries re getting refunds if they cancel, instead of just saying no, tell them that Airbnb's policy is now that at this point, travellers should be aware that Covid may cause travel disruptions (not like back in the early spring of 2020, when the pandemic caught the whole world by nasty surprise), so hosts' cancellation policies will be upheld, and that you would love to have them as guests, but that they should make sure to purchase travel insurance so they'll be covered in case the trip falls through. Maybe that would jog some of them to do that and go ahead and book.
Guests just don't seem to ever think about the fact that if they could just cancel whenever their travel plans fell through and get total refunds, hosts wouldn't have a viable business and there would be no such thing as Airbnb.