Electrical Main Panel

As CudaFish1968 said,

2 8' ground rods 6' apart is the NEC requirement. Using one continuous piece of #4 bare copper wire.

Depending on the meter system the provider uses they could see that the meter is removed, and shut down meter. Some “Smart Meters” have Tamper Detection in which case, removing the meter from the socket will throw an alert. If your power company does inquire, I’d simply say that you had an electrician here to replace a defective main breaker and he removed the meter for safety. It’s better than saying you did a panel upgrade and added a sub panel. When dealing with inspectors, the key word is “Existing”