Hello DBU,

In that case you achieve using the stages.

Solution 1 : Dynamic Solution

Need to add one checkbox field in stages field (this field mainly use for the set fields required)

If the helpdesk ticket stages move and ticket stage --> checkbox mark true based on that you can apply required field conditions.

Solution 2 :

Based on helpdesk stages name you can set field required.

Kindly connect me if anything is required.

Thanks.