JVC RS-840UD

Hi.  I’m an AV integrator from Campbell, CA.  Trying out your remote for the 1st time on anproject after meeting you guys at CEDIA 2018.  This project has a 4K JVC Reference Series RS-840UD.  No luck with IR codes in the database.  We tried another JVC models codes and still no discretes.  Is there a fix for this?  I’d really like this remote to be an option for my clients, but toggle commands is a no-no.