Using UE For a virtual set to be used in a web event

Good morning. I’m preparing a Virtual set for a conference in Stream and I’m using UE
I would like to know if I need to pay any royalty for as I’m charging for my Job and the company who ask me for the service will charge the final client for the set
Thank you

Are you able to provide a little more detail on the nature of your services and the company’s product? Are you delivering the product as an executable to the company? How does the company use/distribute the product?

Is for a Company virtual conference. We just insert the cameras into UE. No executable.
Is an AV Company and they are preparing a Virtual Conference for one of their client.
Conference is Private. ONLY for Company Managers
All the sets they are requesting me (3) are the same process. Private conferences.