Wow! I have an ACL reconstructed right knee, and I require neither a brace, nor any other swing adaptations to accommodate my swing. Yes, it hurts and puffs up a bit after a round, but it doesn't kill me! All I need is an Aleve to fix that. I've wondered about CBD products to deal with issues during a round, but the price of these things is putting me off! They are expensive! I figure I'll wait until more outfits get into the market, and prices begin to come down.
I deal with a bad knee myself.
I'll wear an elastic brace when it becomes cumbersome and will play, but it affects my weight transition on those days.
I flare my left foot outward a tad and open my open stance slightly.
I'll use Advil before playing which helps keep the swelling down.
The tough swing is on a sidehill with the ball below my feet.
Pivoting in this position is usually painful.
I'm not a big fan of a wide stance, it hinders torso/hip rotation IMO.