Hello again! I asked around, and we can’t recall ever having TACAN channels listed in an info panel. They might have been on charts, but we do not make the charts (Jeppesen does) and thus do not control what they look like or what they contain.
That said, it certainly is possible to manually (or programmatically, or a mix of the two) map the navaid frequencies to their corresponding TACAN channels. If you would like us to do that, please vote for this wishlist topic:
For any further additions or questions, please refer to that thread!
Kind Regards,
Malte