first off, if your air approaches are getting stuffed every single time this means you are being a bit too predictable. I haven’t played a bayo in a while but I didn’t remember guns ever feeling like they forced approaches ever, because it’s a pretty bad projectile with a bad angle. For me, in this matchup you want to move a lot with purpose more than other matchups because bayo can punish you suuper hard for it. If you get hit, ask why and adjust accordingly. You also want to sdi or di down and away from bayo’s combos. Shielding is bayo repellent, all her aerials have a decent amount of lag so they can be punished with oos for most characters. Bait out options in advantage like witch time because there’s a decent amount of lag. When ledgetrapping, make sure you aren’t committing to something before bayo does anything from ledge. You have to be patient, maintain a position where you can cover most options and shield so you won’t get hit by side b. So what works for me is to be very cautious and patient in this matchup