Hi, I am developing a mod currently that affects worldgen by adding new blocks and ore. I have spent time looking but cannot find a solution to this. The ore itself does not show in JER, infact, clicking it in JEI does nothing. I first started by searching for a way to add integration, perhaps there was a mod API and a dependency I needed to add, but could not find these, or any information on the wiki aside from outdated information about profiling.

How can I make JER detect the ore? Is there a file I need to add? Part of my request here is for instructions to be added onto the Wiki.

Detect an ore is currently not possible, you can use the API (https://github.com/way2muchnoise/JustEnoughResources/tree/master/src/api/java/jeresources/api) but that might not suit your needs.

Just really need to get around to re-implementing the profiling or some magic with the new data driven ore definition stuff.

Don't have a specific maven setup currently since bintray died, but the API packages are up on CF as additional files.
You should be able to use CF as a maven (https://support.curseforge.com/en/support/solutions/articles/9000197321-curseforge-upload-api)