FtM top surgery and MtF bottom surgery both cause you to lose body parts (breasts and testicles respectively). MtF top surgery and FtM bottom surgery usually cause you to gain the same body parts. The only situation where a transition causes people to gain body parts without losing any is hormonal therapy for transfemme people without surgery.

Transition doesn’t make you lose body parts though

Mine certainly did

I guess the magical version might not cause wounds or loss of limbs but depending on how the magics interact it still might reset you somewhat

It's dnd anyway. There's so many magic ways that you can change gender there that aren't irl medical methods