I don't think it's very surprising, given that there's a war in Europe, the cost of living is going up steeply, and we have all-time record Covid infections. The mini-budget didn't do anything at all for me. I suspect a lot of people are waiting to see what happens. Greece won't be getting any Russian or Ukrainian visitors, and fewer, I suspect, from the Baltic countries or the ex-Soviet bloc.
However, a decisive Ukrainian victory could bring some of this to an end sooner rather than later. Russia is near-bankrupt and did not bet on a prolonged war. It's costing Russia an estimated $11 billion per day. That's not sustainable when your economy has tanked.
The epidemiological data from Denmark suggest the the current Covid wave will decline in a couple of weeks or so. That would be one concern reduced, at least.