[QUESTION] Could I boil the mussels in the seafood stock until it opens up, and then reserve for when the seafood paella is ready?

Instead of putting the mussels on the steaming rice and discarding the mussels that don't open up, I was wondering if I could do boil my mussels in the seafood stock until it opens, and once it opens, set it asides until the paella is ready. After the paella is ready, I can transfer the mussels on top of the rice.

My idea of boiling the mussels in the broth is because I want to make a seafood stock, and I believe that the mussels themselves would enhance the flavor of this stock.

bon appetit