Currently the only way to access the ability to program a separate audio receiver or sound bar is to manually program the remote to the TV first, and then the audio system option appears. Please follow the on-screen instructions to complete the programming setup.
Upon successfully programming the remote to the TV, the user is presented with the audio option:
Is your Fios TV One or Mini connected through an audio receiver or sound bar? > Yes > Select your receiver brand > Set up your (brand) receiver > Press OK to test > Did it work?
▶ Yes, it worked (successfully programmed)
▶ I can't find my TV's model number
▶ Enter model number