Wow, you posted this on the 1st Jan and haven’t had a response? I’ve had this issue twice now where I too am facing the same problem of which the ILS diamonds are missing. My issue is exactly the same as shown in your video. Correct Approach is entered, ILS runway displayed and Frequency is showing on PFD, LS is selected but no GS or LOC diamonds showing on PFD. As a result, even arming APP will not capture the Glideslope or Localizer, although GS and LOC showing in PFD.
I have never had this issue in 15 years of flight simulation flying airbuses and I have now had this twice in a week using the a330. So this surely would have to point to a bug within the aircraft itself?
I sincerely hope my comment doesn’t get ignored like yours has