Adding the Monastic Archer Stance feat on a monk is supposed to make the character trained in the longbow, shortbow, and any simple and martial bows with the monk trait. I’ve added a Composite Longbow to my characters equipment and equipped and I’m not seeing the +3 to my attack for being trained with the weapon. When I click on the bow to view the details of the modifier, it says:
+4 Dexterity Modifier
+0 Martial Weapons Proficiency (Untrained)
Also tested this with Composite Shortbow and regular Longbow and Shortbow, same issue.