In SQ42 video slice, when he get delivered as we been shown, he's being delivered in a MPUV personnel and that is already flyable.
There is also the MPUV cargo which is exact same ship but different module attached in the cradle.
MPUV does not have a QD or JD, it is a orbit to surface or ship to ship transport and that is it's only function.
I hope we see more use for the cradle on the MPUV to be able to lift like container crates or sick, injured person transport module.
Only SRV have QD/JD so you can transport what ever you are hulling with the tractor beam and I think it come with a small set of most components.
But there look like there is a option to upgrade most stuff in it from small to medium as it listed as available M.
Or that is just a temp fill in the stat page and it's not complete, but it does come with both drives Small or Medium.
Guess we have to wait to know which it is delivered with.
CHEERS!