Transitioning from 2 rooms to 1

We’re moving from a sfh to an apartment. So going from 2 separate rooms to 1 room/bunk.

Kids about to be 5 and about to be 2. So far, it’s been rough. 5 year old has been okey, 2 year old takes foreverrrr to sleep, then sometimes wakes up and bothers the older one. It’s been a couple of weeks of mess. We did go on vacation and we had to co sleep due to rooms etc , which I’m sure didn’t help.

Any tips…. Suggestions. Please tell me it works out at some point.