Can one LLC own two completely unrelated businesses, or is that a terrible idea?

A friend and I have had a small LLC for about three years selling custom signs and other handmade stuff online.

The business isn't dead, but we barely do anything with it anymore. We still get a few random orders and there's some money sitting in the business bank account.

Then we did something pretty stupid.

We found a used cargo van for a really good price and bought it using money from the business.

Neither of us currently runs a delivery business.

Our thinking was that we could start doing local deliveries, hire someone to drive, or maybe rent the van out to another business. We clearly thought about all of this after buying it instead of before.

Now I'm wondering what happens with the LLC.

Can our existing LLC legally go from selling handmade products to also running a local delivery service?

Or would it make more sense to create a completely separate LLC for the delivery side since the risk seems much higher than selling products online?

I'm especially wondering about insurance and liability if someone else is driving a vehicle owned by the business.

Did we accidentally buy ourselves a new business, or should we sell the van before this becomes an expensive lesson?