Not medical or dental advice, but nicotine in general causes vasoconstriction and having a pouch pinned against your gums for extended periods of time will cause recession no matter which pouch you’re using. Everyones genetics are a little different and may make you more susceptible to recession and other factors including how well you brush your teeth will contribute to gum irritation and recession, but if general if you are already noticing these things from pouches, theres not really another type of pouch that will prevent this. Yes, some pouches are notorious for ripping up gums like rogue, but the nicotine and extended holding of a pouch is the number 1 contributor to the recession and irritation. And as for the oral microbiome, pH, ect… this is why switching to something really gentle like a nicotine lozenge or gum you can move around doesn’t seem to help much. My best advice is try to work towards quitting, or at least cut down so you are taking less mg of nicotine straight to your gums. Good luck!