BMW make a wider rear mudguard. It's OE on NZ/Aus bikes. Seem popular. I might get one as my Puig hugger snapped, like they all do.
https://cotswoldbmwmotorradonline.co.uk/products/bmw-motorrad-rear-mudguard-extension-r1200r-rs
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Got one of those fitted to keep the muck off the top box. Not sure about this, but it may interfere with the evo pannier fittings which I think you have on your bike? And indeed the shad rack fittings. I was recently evaluating pannier options and looked the case to me. I could be wrong though.
