Does the camera on the iPad Mini 2 A1490 have IR capability?

No.

The vast majority of commercial device cameras include an IR-cut filter in their lens construction - to improve both image and focus performance.

Whist some cameras will still have reduced sensitivity to IR - which would therefore require an external “flood” IR illumination source - IR sensitivity is almost always at the detriment of “visible light” performance.

I hope this information and clarification proves to be helpful.

If it doesn't support FaceID, it does not have an IR emitter.

Quick and simple answer? No.