So, it doesn't matter if it's your house, your car, your roof, whatever. Your insurance adjuster has very little clue about what it needs to be fixed. Insurance companies and adjusters working for them are not engineers, roofers, automotive paint and body professionals, etc. They only know what's on a list and macro when they push a button. They pump out an estimate that's hopefully good enough and they send it to you and most of the time the owner doesn't know any better either.
As stated, you need to have someone provide an estimate for the work, including replacement of all
Steel. You are not asking insurance if they'll pay for extra stuff, you are telling them what it's going to cost so they can approve it.
Don't quit. I can tell you with 100% certainty that being a thorn In their hide will get you what you want and if it doesn't, then you just need to find a bigger thorn.