From memory this scenario is unfortunately not unique, I seem to recall a posting a few months ago where several people experienced a similar thing. Seemed the solution was to have a secondary connection to a base plate on the body from the lens strap. Glad to hear you can get it fixed on insurance, not something you expect to have to deal with. Are the repairers going to check for other incidental damage, AF assembly bumped out of proper alignment, sensor assembly shifted slightly? I don't know if these things can happen under high G deceleration conditions or not but I do know it could be difficult to get fixed later as proving they are part of the same Incident could be difficult after a repair centre deems it satisfactorily repaired.
Just some thoughts, sorry to add to your anguish, but better to deal with it now than later.
7DII+Grip, 7D+Grip, 40D+Grip, 5D+Grip, EF 24-105 f4L EF-S 17-85, EF-S 10-22, EF 70-200 f2.8 L IS II, EF 2x III, Σ150-500, Σ17-70 f2.8-4 C, EF 50mm f1.8, 550EX, Triopo TR-985, Godox FC-16, Filters Remotes Macro tubes Tripod heads etc!
5D, 20D, 24-105, BG-E4, BG-E2N, 17-85, Nifty 50 pre owned. 😀