if the squad can use it even if you don’t have it unlocked, you still can, if not, just like before you’ll need to get the squad
but as far as it goes, right now they are still vehicles fully upgraded ( which i forgot to mention ), but those are just reskins as they aren’t necessarely better from the base vehicle that you research. just look through the squad that you own and see if there are the upgrades for it in the last tab.
perhaps even better as you don’t have to buy them with silver and don’t have to worry about upgrades.