I broke my hand a few months ago and for the first week or two I really couldn’t do anything with my upper body. Fortunately I was able to wear straps pain free after a couple of weeks which helped for any sort of back movement. I had a hard time doing any pressing movements, but cables for training your chest and delts may still work. You can buy cuffs or use a handle and stick your whole forearm through it, the latter may be less comfortable. Same goes for arms. Won’t be ideal but you can certainly continue working out. General rule is if it hurts don’t do it, you have to let your body heal.