The "lock stop" is what keeps the handlebars from rotating all the way around.
Any frame damage whatsoever, requires the frame to be replaced, in the eyes of the insurance company. If you can provide them a written estimate from a reputable shop that shows they can repair the frame back to factory specs, and the cost does not exceed the valuation they've established for the bike, then you can typically convince them not to total it.
I have personally worked with insurance claims adjusters with my stuff, and kept claims from resulting in a total.
Until they issue you a check and you cash it, it's your bike - you tell them what you want.