I am wondering if a weapon used to unlock 2 or more different teams, what will it be like in future game?

Like fg-42 used to unlock 2 different engineer teams at two different battle fields. Can I unlock all these teams in the future?
Because if I can’t unlock them all, then old players will have more teams than me. And that will cost me more card to reset the upgrade of team to fit in defferent BR.

No, you won’t be able to unlock 10 different engineer squads, only 2