Would it be possible to let us add which blocks the new version of the echo locator can detect in a config file so we can add support for it to work with modded ores?

The echo locator uses the block tag geodes:echo_locatable to determine which blocks it can detect. You can add or remove whatever modded blocks you wish to this tag with a datapack. The tag by default includes the conventional ores tag, so it should work out of the box with any modded ores that use that conventional tag.

Ah ok, looks like geodes:echo_locatable detects c:ores, and a couple of the mods I'm using don't have that tag added to their ores. Adding that to them with a datapack fixed that issue. Thank you.