Welcome to the community. I don’t know if this will help, but I use these
2-Pack Universal Magazine Holster IWB Clip | 9mm .40 .45 | Mag Holster For Glock 19 43 17 Sig 1911 S&W M&P | Fits Any 7 10 15 Round Clips For All Pistols | Gun Ammunition Holsters | Handgun Ammo Pouch Amazon.com
Instead of putting them in the waste band I put them in my belt like so
This keeps the mag secure. Keeps the mag from rubbing against my skin as much. Keeps the mag from taking up space in my waste band.
They work with my shield mags and my full size M&P 40 mags.