You should make two global variables. One for the tile's X and one for the tile's Y.
Set variableX to: TileMapName.PositionToTileX()
Set VariableY to: TileMapName.PositionToTileY()
Set the layout position into the (), i.e as an example number for PositionToTileX(24). Then, using the Erase Tile action under your tilemap, set the X/Y when it asks for them to your global variables and you can then also use your two global variables to spawn in an object at the same location right after, as long as you don't overwrite or erase what is in your two global variables.