Now I know how to use the ILS

In the sim it seems very hit or miss on whether or not you will pick up the signal even with the correct frequencies inputed. Certain airports even though they have ILS listed and the frequencies, don’t put out a morse signal, or any signal for that matter. I flew a short hop in the Skyhawk from Bristol to Cardiff, to test the ILS and it worked perfectly outbound and practically landed itself. On return to Bristol, nothing at all. Not a peep! Even with the correct frequencies in place. As a test I flew a wide loop around the airport at 4000ft to see if I could pick up the ILS. Nope nothing! Anyone else having issues? Or once again did a miss the not so glaringly obvious?

In Xplane is see the ILS Frequenzy on the map. How can i find them? Only on Charts?