It's simply going to be a case of the clubs, players and staff having to work more with less(time and money) a lot like some of us suffer at work currently.
If the competition does not generate income for those involved scrap it for a season. International football should be the one cut back, but I suspect as with the Premier League that FIFA won't be wanting anything close to that. International travel involving changing entry/exit rules makes it a joke. Israel could forfeit their Euro playoff game with Scotland's due to goverment rules for example. The Nations League should be scrapped and international football curtailed until at least March for the world cup qualifers and a few games leading into the Euros
As for the League Cup its possible to change the format and regionalise the earlier rounds. Group stages. No extra time, but crowds not allowed in especially likely in the earlier rounds where is the benefit for the lower league clubs?