Muscular imbalance for various reasons

i have been working as a waiter and had been playing football for many years. As a result of those my right leg (both quad and ham) and right hand (bi, tri and forearm) are more muscular, bigger and probably stronger.Not in an extreme way but noticably, at least the visual part.

How do you approach this issue?Do you assign unilateral work?

Yup, unilateral work would is well suited to addressing these imbalances.

volume work or intensity too?

e.g. bulgarian squat with barbell for 3 reps

Both but mostly volume.

I've got a shorter leg (left one) causing me a hip rotation down in the squat.
Moreover right glute is less used and I manage all this things with light static exercise to unbalance.