I haven't had anything done yet myself, unfortunately still in the saving up funds phase for quite some time. However, ...and guys feel free to correct me if I'm wrong, but done in a very careful fashion, assuming you already have decent relative strength, certain calisthenics in the form of more compound movements and obviously scaled/modified back to your needs, ie Archer rows, chins and pulls, dips, Serge Norbert style..high volume, high reps, increased eccentrics, multi angular isometrics, partials, etc, and theraband and/or light dumbbells for shoulders, (obviously being careful and mindful of WB status), ... something like a Joe DeFranco "shoulder thrasher"...worked for Triple H of the WWE, stomach vacuums/posterior pelvic tilt whenever in your w/c...never a bad thing to improve lower back health and assist getting a more tapered waist.
To me, the unilateral stuff, bicep curls , triceps extensions , etc are all well and good , but I would go for the most bang for my buck with the compound stuff with options are limited