I don't know if I don't know what I am doing, but in cold biomes and in the winter season, the cold breath effect doesn't show on my player but only on villagers. I tried playing around with the settings and nothing shows the cold breath on the player. My game version is 1.20.1 Fabric and I have Biomes O' Plenty and Serene Seasons installed.

Never mind it was me, I had to be in survival for the breath to show.