2D Tilemap Extras - Custom Rule Tile

i see that the 2d-extras github project was closed and the 2d tilemap extras package is now the offical branch.

i want to create a custom rule tile with two goals:

instead of sprites it uses only 1 gameobject and materials and changeing the material of the placed gameobject depending on the rules, it should also change material based on random.

the rule tile should be have a modifier so it connects to the same rule tile of this type, so it will be possible to connect grass with dirt on the same layer if these tiles are the same type.

some nice extras feature will be something like merging textures to created seamless transitions.

Hope someone has a idea of this.
Thanks all!