@Karen-And-Brian1 While I realize it could be a long time before COVID ceases to be a good reason not to travel, I don't think it's fair to say that an August reservation needs to be cancelled due to COVID at this point. Of course, we all have different levels of comfort around when we'll feel safe to travel again, and as far as I'm concerned, better to be safe than sorry.
But as Andrew pointed out, the host doesn't have your money at this point, so they can't very well "refund" money they aren't in possession of. And if you booked a place with a Strict policy, and only paid half up front, you aren't due anything back because the 50% you were due back is 50% of the total reservation cost, not 50% of what you paid up-front.
Did you even dialogue with the host at all? Some hosts may be willing to refund a guest who cancels if the host is able to rebook the cancelled dates. Of course, they would only possibly be open to this if the guest asks politely and respectfully, not if the guest berates them for upholding the cancellation policy the guest agreed to when they booked.