This was asked on the Battle Tree Discord channel, curious if anyone has used Comfey & Ribombee enough to know:
According to the bulbapedia article, Pollen Puff is not on the move list for being affected by Triage.
Triage does not affect Aqua Ring, Grassy Terrain, Ingrain, Leech Seed, Pain Split, Present, Pollen Puff, or Z-Moves that only heal due to their Z-Power effect (such as Z-Conversion 2).