Weak Aura - Load in Mythic+

[Dastey]

Trying to make a Weak Aura that only loads while in mythic+ dungeons, however I can only seem to find an option that enables it during mythic dungeons.
There must obviously be a way to get past this as addons like GottaGoFast and Blizzard's own UI can distinguish between the 2. Does anyone know how?

[Reloe]

I think technically mythic+ is considered as challenge mode difficulty which is still an option to chose from for weakauras.