Did you check out the official inibuilds A310 tutorials on youtube?
There are several examples of ILS approaches (both manual and auto-land) at the following locations:
New to Airliners - A310 | Part 2 …starts at 36:09
EFB & Approaches - A310 | Part 2 …starts at 10:57
Return to Airliners - A310 | Part 3 …descent prep starts at 6:40
I’ve had a few issues with the plane but none to do with localizer/glideslope capture.