Very small submucosal gastric mass found on routine endoscopy. dr said it felt soft when biopsied (normal result), and did flatten a bit with air insulffation. is this trending towards benign?

If the lesion was biopsied, as you say, examination of the tissue by a pathologist should provide definitive answer. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV and Covid vaccines. Wish you good health!