WFS, I think it's important for your kids to socialize with their dad, so so maybe it'd be a good idea to set up some time for them to do something like zoom meetings? It's possible to have dinner together, play games, even workout together over video and voice, even if there's no physical closeness for a while.
It'd be the same if this were something like a bit of a longer trip abroad, just that then the two parents could have discussed things beforehand, but mixing households if there's other contacts as well is currently not a good idea.