Electrical Service (Overhead)
I do not have the answer to your question, but would like to share my experience.
The previous owner of our house upgraded from 100A to 200A service. One of two things happened, can't recall, but either a) new roof or b) smart meter installation. Whichever it was, the power company said that the roof attachment was not strong enough to support the weight of the 200A service, and would need to be repaired. They gave me a pamphlet, which of course I cannot find right now. Went thru various scenarios, including installing a larger diameter pipe, but in the end, I paid a licensed electrician, he  installed a u-bolt that wrapped around one of the rafters and feed between the slats. Also an MSEE.
TL;DR might need to do something to handle the increased weight of heavier wire.