sorry for all the questions I have tried to update the map with tiled but using some of the tiles don’t seem to have collisions as the player falls through them so I need to set up collisions on levelfloor after updating the map on tiled
In Tiled, if you changed the tiles in the tileset, without giving it a class, gdevelop won't be able to create the collisions for it, so the player will go through it, to fix that, you can simply add the Class in Tiled so gdevelop auto-detect the collision, you can read how to do that in here:
https://wiki.gdevelop.io/gdevelop5/objects/tilemap/#define-tiles-collision-mask
The class filter name used in the project is Floor
So make sure to Tiled → Open tileset editor → Select your new tiles you want them to have collision → Set the class to Floor → Export as .tmj → Import into gdevelop and replace the old level collision.