Like Meta Ridley said, there’s no way to test this. But we don’t need to test it. According to Bulbapedia, the moves affected by Triage are Absorb, Drain Punch, Dream Eater, Heal Order, Heal Pulse, Healing Wish, Horn Leech, Leech Life, Lunar Dance, Mega Drain, Milk Drink, Moonlight, Morning Sun, Oblivion Wing, Parabolic Charge, Purify, Recover, Roost, Shore Up, Slack Off, Soft-Boiled, Strength Sap, Swallow, and Wish.
No, Pollen Puff wouldn’t get boosted priority from triage, even if it’s being used on an ally.