I think quarantine has affected all areas of people's lives, not just gambling.
I also saw statistics that online gambling made a lot of revenue. But it seems to me that online gambling was available to those who had money or who did not lose their jobs. The rest suspended this gambling activity.
But the quarantine is not affecting online gambling because that is out from real life.
Online gambling makes a lot of money from the people who move from traditional gambling or physical gambling to online gambling. Still, since on the internet, we know that there are online crypto gambling and online gambling using fiat money, we don't know which website has made the biggest money.
Some countries decide to reopen their country so that they can allow physical gambling to start their business and make money again.
I am not expecting the new case of Covid-19 if the physical casino reopens.