2D Tilemap Gameobject Brush Script for Editor

Hey guys I was just checkin out the Tilepalette Extras and found out that you can paint Gameobjects on a TIlemap tho it only works for one at the time then you would have to switch the object everytime, also it hasnt the function to preview where it is going to be place I'm only gonna see it as soon at is already has been placed.

Now I wanna write a script or find an asset that can do the following:

• Paint 2D GameObjects

• Paint 2D GameObjects on a Tilemap (not that necessary)

• Preview of GameObject before being placed (transparent)

Important: This is being used to for a Platformer game where I cant just use sprites (Gridbrush) and a tilemap collider since I need to have the posibility to edit every single of them via script ingame.