Additionally- the F-35B has a smaller combat payload than the F-35A, due to the combination of internal space/weight for SVTOL capabilities and lower payloads a

Additionally- the F-35B has a smaller combat payload than the F-35A, due to the combination of internal space/weight for SVTOL capabilities and lower payloads and the lower payload available for short takeoff. Vertical takeoff is mostly an airshow demonstration- you can't carry a useful amount if fuel or weapons vertically, so in practice it's an STOVL rather than VTOL.