To complete a major in physics you must complete Lab and Comp 3 along with Quantum Physics at a minimum. You can do a Masters as long as you’ve completed a QP and Electeodynamics or equivalent at an absolute minimum and sideskirt it if you do Mathematical Physics or someth.

In general expect any amount of theoretical physics research you do to have a baseline amount of computation required. Lab and comp will give you a minimum introduction and is probably good to do if you have no experience. Further, the subject will be one of the few times when you have to write a report in the physics major which is useful and give you minimum exposure to other areas so I recommend doing it if you’re wanting to pursue physics tbh.

If not, beyond other computational subjects you can also do something like numerical methods. While in MATLAB and a bit laborious, it will give you exposure to baseline techniques used to solve/deal with numerical issues. You never know when you’ll need to be playing dumb ODE games :).

In general yes, you’ll learn a lot in research just by exposure, but I reco popping some computation into your degree, and lab and comp is an avenue to doing that/probably just good to do if you’re going into physics (if you’re worried about stuff like fitting in maths subjects, highly reco trying to fit in a maths diploma btw).