Hi Mcat1. Welcome.
For sure Covid-19 has all of us looking like a deer-caught-in-headlights. While we on the "normal scale" can work at bringing up coping mechanisms, these challenged children of ours have little or nothing in reserve.
As more and more services will be closing down due to this pandemic, so much now is going to be on your shoulders (and hopefully the weight and the work will be shared by your husband) on how interaction takes place with your daughter. By staying calm...biting your tongue...using some of the "tricks-of-the-trade" that are shown on this website...all can help to ward off escalation in a situation. Not easy!
Do your homework here, Mcat1. Read all that is offered on this website (and there are leads to more). Watch videos that give you an idea on how a strategy can work. By all means, keep sharing here. This can be your safe, non-judgmental sounding board where you let off some steam and feel the support of others.
((HUGS) from one Mom to another
Huat