I would suggest activities all together but also one on one time with each of them

Group bonding sounds great but try to give them some individual 1:1 time. Gently let the others know you’ll be spending some time with X first, and then Y’s turn will be later and Z’s turn after that. Give the others positive praise when they do something by themselves when you’re giving 1:1 time with X first.

yeah try to do group bonding like baking. it can be hard but you can try to get one on one time. take them to get their nails done or a haircut and treat. make them feel special for who they are 🙂

Could you try having special time with each of them, where they get their own time with you, without the interruptions of their sisters? Depending on their ages/ maturity levels, teaching them that if they can get along when you are all together means that they get that special time with you might help.
It must be so hard when they all want your attention.

I am constantly battling with this problem with my kids. I am still trying to find a solution so am not very helpful but just wanted to let you know you\\\\\\\’re not alone.
It is hard to split your time and attention between everyone so no one feels left out.