Yes, I would lean towards the idea if it being an enhancement if I floss prior to OP. If not done before oil pulling, I feel like OP (at least for me) accomplishes the removal of the debris that flossing would have done plus some of the normal oil pulling benefits. Maybe not as much benefit as if I had gotten the debris out of the way first. (Just not sure!)
So as you can tell, I'm on the fence about it but feel like I get acceptable benefits either way. I’d rather do more for myself then less but won’t be too upset with myself if it slips my mind.
So keep doing what your instincts are telling you.