I would not use "toggle bolts" with the expanding "butterfly wings"... They are "impossible to keep tight and you'll have to leave the "toggle part" in the hole if you ever have to replace or repair in the future...
I'd use the "expanding jack nuts" instead. Drill holes the correct size for the jack nuts, put some sealant in the hole, install the jack nut, use the expanding tool to set it in place, then use the bolt supplied with the jack nut to secure the awning rail.
Here's photos of the jack nuts and the proper tool to set them. Just be sure that the jack nuts you choose have the "correct depth throat" so they secure to the thickness of your FILON wall without being too short so they crush the FILON rather than "squeeze against it".....
They are available on Amazon at very reasonable pricing, and at nearly all local hardware stores, but the price will probably be almost double the Amazon prices....
Take a look at the video in the illustrations on this link (which is a hardware site). The video shows how the Jack nuts work and how the tool "sets them properly".
https://www.temu.com/30-sets-hollow-..._id=9rfkmkuqgl
Just don't forget to use butyl putty tape between the jack nut and the awning rail !!!!! There's about a 1/32" gap caused by the jack nut head and if you don't seal it, it will "guarantee a wet FILON backing board".....