There is a Divining Rod for each ore (that is, any block/item that has a tag beginning with #c:ores/). When held in-hand, nearby ores of that type will be visible through walls.
Caution
The custom render type that this uses is currently not compatible with Sodium! It won't crash, but the ores won't be highlighted.
The same recipe can be used for any ore type, just substituting the actual ore itself. It follows this pattern:
OSOSESS S
where O is the ore block, S is a Stick, and E is a Spider Eye.
You can also craft a universal Divining Rod that works for all ores!