It’s pretty easy to say – “if no one is leading, then become the leader and take control”.
It’s another thing to do it.
There is most likely no prescribed guidance for the situation you are in so someone talking about how they did this for that probably would not work for you.
So what do you do?
Take a no-holds-barred approach, kick everyone out of the room and do your own thing?
Try and see if you can deliver all that work on your own?
Maybe it’s not about you taking the reigns, but picking them up and showing your team that you all need to do it together.