Motion tracking workflow

I'd like an improvement about motion tracking workflow about solving different cameras in one project. For example, when we do a short movie with green screen footages, it is possible to solve only a single camera and not as many as we want, trying to solve other cameras with different lenns will always erase the first camera animation keyframes so we can't stack many solved cameras in one collection. Which forces us to copy the scene for each footages instead of having 1 single scene with 2 or more solved cameras which makes that we can't first motion track and then build the universe, which is the best way to do, but instead make us build the 3D universe where everything has to be seatled, perfect and doesn't need any modifications to be then copied, which is not the good way to proceeed. Thanks for reading