Maya, How to export two meshes combined with individual physics

Fiz meu modelo de granada alemã no maya e texturizei no substance painter

https://prnt.sc/gmr1xe

and in Maya I would like to export to unreal so that it was the mesh of the body of the grenade with the “pin” of the grenade, however only at the moment I throw the grenade the two meshes separated but each with individual physics

https://prnt.sc/gmr3o0