According to Fu Xi's initial plan, the Qilin were to bear the heavens and the earth, ultimately becoming part of the Da Luo Dao Fruit, thereby seizing the opportunity to touch the Da Luo opportunity and prove the Dao to transcendence.
As it stands, this plan is halfway complete.
The Five Elements Qilin Kings have indeed transformed along with Nuwa's growth, becoming part of the Da Luo Dao Fruit.
However, they have not yet fully emerged from the influence of the Nuwa Dao and cannot completely transcend from the Mountain and Sea World.
This has led to the current awkward situation—withdrawal would mean the initial investments sink, but if they don't withdraw, who knows how many years it will take to prove the Dao to transcendence.
"Perhaps we can cooperate with Nuwa."