For the real answer consider posting your question in the retirement forum
here and look for a reply by Alan S.
My impression is the same as you found in the Pub………..that COBRA is covered. You might want to contact your HSA folks to see why COBRA is
not listed…….may just be an oversight.
I assume you’ve had the HSA all yr? since you can’t pay bill that were
incurred before the HSA was started. I believe you can do in out day/out the next but if you can earn more in the HSA (tax free) than you can earn outside it, wouldn’t it be better to pay from some other source and pay
yourself a little later?