I haven't tried it before no, but I followed your guide as closely as I could and still couldn't make it work. My character fell through even though I made sure to run the event at the beginning to autofill the tilemap, I made sure that behavior was applied, had my Collision tiles marked and gave the objects the platform behavior. I could try it again but I sincerely don't know where I went wrong if there was a mistake on my part somewhere
Viewing post in "Add Tilemap Collisions" Extension for GDevelop comments
Here are the notes I can think of right now
Note that this extension differs from the "Tilemap Collision Mask" added in GDevelop 5.0.139 in the way "Tiled" is set.
The "Tile Layer Formats" of the tilemap file must be CSV.
Is the "Layer Index" value you set for the behavior correct?
Does the GDevelop debugger show any warnings or errors?
I went over everything and double checked - I think I got it! it still didn't work when I tried the "isReady" condition but I realized the map I tried to use had multiple layers and I think that might've been messing it up, but now it seems to work! Thank you so much for making this and for helping me so thoroughly