Yes, we can still bet online but the change is that only few sports are available to bet on. So if you are not familiar with that sport, you have to wait for that sport to have their match. Unless, you are also willing to learn about the sport that you do not usually bet on.
Some sports leagues will resume in the next few months.
At least one of those should be familiar to you so not a problem at all.
But I agree, if a gambler reaches the point that they are now eager to gamble at different sports since their favorite league is suspended, they can consider putting up a bet on other sports as long as they will DYOR before risking some money.