In a recent 10.1 group interview, Morgan Day announced that no Seasonal affix will be present in Dragonflight Season 2, and the level 7 bucket of affixes is getting an “affix refresh”.
Seasonal Affix in Dragonflight Season 2
Seasonal affixes were added in Battle for Azeroth to change up gameplay from season to season, as the dungeons didn’t change from season to season.