toddler sleep - desperate for help

Hi all, our wonderful triplets are nearly three and we are on our knees with their sleep atm.

Two of them recently started being able to climb out of their cots so a week ago we took the plunge and took the sides off for their safety.

We have now gone from kids that will self-settle to sleep and go through the night to having to sit in their room until all three are asleep and deal with dreadful night waking.

This morning our day started at 3:15am because one of them woke the other two and they were all running around the room laughing and shouting. It took two of us over 90 minutes to settle the three of them back down again. They have finally gone back to sleep just as it is getting light.

Does anybody whose multiples are older have any advice for us? We feel so defeated that we had a good sleep routine for ages and now we are dealing with this. Things are tough anyway at the moment with the usual threenager big feelings, how violent they can be to each other and all the other stuff that comes with having multiples.

Grateful for any advice or tips, or just solidarity from those who are/have been there - thank you so much 🙏