Studies and surveys can't be instantly generated and it is hard to find the latest especially during the pandemic.

Anyway, I've got this Top 10 Gambling Cities in the World in 2020 and has been published earlier this year, maybe this could help us. But probably there is a huge change when the pandemic hits us badly. However, I don't expect a huge change then.

Well, it is to expect that many countries have a massive growth of gambling institutions. And as OP mentioned about losses, it probably more than that as we think.