Nice looking awning; I’ve never seen one without some sort of angled support.
Does your awning have the feature that retracts it when the wind is strong and can you lock it out?
I would check with the manufacture of the awning to see if they have already made supports, even if just to see how they would attach support poles.
If that doesn’t work I would call the manufacture of the screened in room you’re looking at, they might have an answer.
You might need a ladder to attach whatever you use to support the awning, just something to think about, might make a difference on how it attaches to the awning.
If I had to make them, it would matter how often and how many different locations I would use it. You’ll also need to think about storage of the support poles. I would look at thick-walled PVC, I would think you could find two sizes that would slide inside of each other to allow for proper height at different sites. A set screw or two it should hold well. You could thread the top and bottom of PVC for a foot and a bracket to attach to awning. Might even use three poles for support you’ll just have to determine what’s adequate.
Pool vacuuming poles adjust for length maybe those could work.
Seems like a fun project
2011 Wildwood T26BHXL
2004 Yukon XL Denali
43yrs of camping; one lucky guy