Some companies will allow you to have different deductible amounts for collision and comprehensive — and some people prefer to have a smaller deductible for comprehensive than collision. If you have any questions, feel free to ask.
The first thing you'll want to do is to check your policy's declaration page to see the exact coverage that you currently have. This may be a physical document or, if your insurer has an app, could be electronic. If you find that your coverage is insufficient, you should start shopping for a new policy or look to add coverage from your current insurer.
DoorDash does cover some liability for its drivers. See more info about what insurance delivery drivers need here. When it comes to using a rental car for deliveries, they will not provide any physical protection for the vehicle.
You do not need to insure the vehicle while it's in transit — especially since it's not yet registered. You'll need insurance once the vehicle is repaired and ready to be driven. If you have any questions, feel free to ask.
It could be tough for your daughter to insure the leased vehicle if insurance companies see that she is not the owner. In addition, your lease agreement likely states that you have to be insured on the vehicle, and they may not be okay with your daughter being both the primary driver and out of state.
If she plans on using a vehicle for business-use and transport people to and from different locations, most personal auto plans will not accept the risk if they know the vehicle was used for work purposes and not disclosed. She'll need to look into a commercial policy or, if available, adjust her current personal auto policy.
We generally recommend basing your liability needs on your assets. From the information you've given, I would say that maxing out your liability limits and getting an umbrella policy is probably a wise decision since you own your home and vehicles and have a high net worth.
The policy would cancel if she doesn't pay the premiums. Legally speaking, this wouldn't have an effect on you if you're a non-driver. However, if the vehicle is found to be without insurance, the finance company could repo the vehicle or force place insurance on it
If they are non-renewing for an unsigned app, you should be able to contact them and get that resolved. If you don't want to stay with them, I would still finish the term and move on to a different insurer.