Description
In the case form, can we add “supplier name” under “COMPANY” currently we can only select a customer and would like to use the case for issues with both.

Solution
Cases track the issues reported by your customers and the responses your support representatives give. Cases are created when your customers report problems, ask questions or otherwise need to communicate with you. You can submit support cases and receive responses in different languages.
So the case form doesn’t allow to send issues from suppliers.

If you still need to add the supplier in the form. then we can create a custom field for the same but in that case also, there will be the Company field which is a mandatory field and we can’t remove it.