Here's how I would do it.
What I would do is first, drill some 1/8" holes for pop rivets through the area to be repaired. Then I would pry that delamination open and inject structural adhesive in there - Pack it in with a tongue depressor or something. Then use aluminum pop rivets to pull the delamination back together while the structural adhesive cures. Mask off the area below the crack so the adhesive doesn't run down on the good part below.
After that, you'll need to drill out the pop rivets, then sand off the paint down to the bare fiberglass for 1-1/2" on either side of the repair area. Fill the pop rivet holes with flox, then lay up 2-3 layers of fiberglass cloth over the crack, being careful not to get any epoxy on the canopy (best to mask it off beforehand).
With the joint repaired structurally, then you'll have to sand some more and blend in the patch with the existing fiberglass, primer, and paint.
Sorry, but you're in for some gooping and sanding and painting, my friend.