I am now testing this on a vanilla world, no changes to settings at all, two mods loaded which are indy overhaul and the deep ores addon. In creative mode I have created a basic scanning array (Large grid, ore detector, antenna, battery and a couple of light armours to hold it together) placing this at my spawn location revealed nothing, I travelled 5km away and still nothing. I then placed the array and using admin tools spawned in an iron asteroid. Initially I did get the HUD indicator to show iron, I then disabled and re-enabled the detector (by turning the battery off then back on) and there is now no signal despite the array being powered and all settings (eg range etc...) the same. I am now inside the rock looking at iron less than 1m away with the basic hand drill selected and see no HUD indicator. I can drill (so the drill works, for what it's worth) but there is still no indicator.

Either the mod or using the ore detector block has broken all ore detection. Again, vanilla world, only the two relevant mods loaded, no changes to any settings anywhere.