The 2021 Summer Update includes a Hunting Task Expansion, Creatures with the "challenging" difficulty, which were introduced in the last summer update, will be added to the hunting tasks as part of the "hard" tasks category. Moreover, a number of new deco items will be available as reward in exchange for hunting task points.
In the past challenging creatures weren't added to the hunting tasks as seen in this Official CM Response- "They might be included at a later date, but for the time being, challenging monsters won't be part of the hunting tasks."