the new rule is that during the lockdown it is prohibited to be a guest in someone else's house, and that includes being a guest in someone else's sukka.

This regulation will be in effect throughout the Sukkos holiday until 2 days after. It will not apply to people who live in the same house.

The punishment for violation of this, if caught, will be a 500nis fine.

I would note that this is in opposition to Minister Yuli Edelstein's statement from the other day when he said they will not be sending police into houses and sukkas to check on people...

if you thought you might go sukka hopping, don't