Based upon your question, I'd sell it for parts and not deal with the installation of a working transmission. You might end up throwing good money after bad. Part out the accessories and then sell the bike...
Take all the Valuable parts and sell them on their own..
Parting out a bike OR Fixing it is actually not that different, you are going to need the same sockets, same heatgun, same torx bits, tons of ziplock bags, tons of space and organization to keep the part organize (And Know what they are too)
Maybe the only think you don;t need when you are paring out versus fixing is a Torque wrench and the knowledge that comes with it..
1600cc , I never try one or work on one and I have no clue of the ill affected areas or pandemic problems, but I do know the more sensors, Can Bus actuators the more complicated the bike gets, them more prone they are to fail or at least stop working.
sure is great to have a automatic adjuster for the heated warmer for you pinky finger but you need to understand that every one of those "Farckes (OH do I hate that word) requires are machinisum and implementation that has a level of complexity, has a weight a cost and sometimes also requires somehow of a mantenianse requirements, specially if you have to take them to as dealer to perform the work add a extra cost
to me the only "De lux" thing you need are the proper TOOLS and the skill to use them, specially in the Field, but the again I have a "Special forces" frame of mind and a phetora of problem solving skills and tricks (Require to ride in the wild, so I can not impose/suppose people think/act in the same manner..
I'm a Gelandewagen Kooid drinker but I thing Gwagens are a patracy of something very dear and utilitarian for many of us..