comments:
Idky people are giving you weird diy or over complicated suggestions… they sell things specifically for this. Look up “ground anchors”, there are ones that are corkscrew style, like the things for attaching a dog leash to that screw into the ground. Except the ones meant for this have various styles of attaching to the legs of the swing. Get the corkscrew style because that will help fight the wind shear pushing in the awning. The straight styles might still pull out. It’s pretty easy to install, you just screw each one into the ground next to each foot of the swing, then screw the top plate to the legs. You might even get away with only doing it on the front two legs. These ones might be overkill, but it gives you an idea of what I’m talking about. There are a ton of variations.