Currently custom dropdown is not possible in the existing dropdown component but you can create your own as a new screen when someone clicks on it will open that screen apart from that make sure you use a rectangle in the background and components in it, and make it group. After that make sure you used half of the screen to create this and don’t forget to enable the sticky option at the bottom and now set the screen background colour opacity to 0. Once done redirect to this screen with float-up as the transition of the screen.