Paper2D : Tilemap layer acces variables

Hi,

I search to create a procedural tilemap with some data but impossible to acces to variables of the layer : ‘Tile width’ and ‘Tile height’.
I try with creating an Blueprint Actor and set a basic layer with settings but when the actor is created, the layer disappear.

So tile width & tile height = 64 Then when i launch the game :

So i was forced to “add a new layer” so that’s why there is a “layer 1”… My "layer 3 " disappear too.

Did someone can help me please ?

Thanks a lot.