Iirc, block 2 apache IDM has the following modes, Longbow protocol (AFAPD), tactical internet (TI) and tacfire (ATHS).
For communicating with the Kiowa, you would be using the tactical internet JVMF for airfire missions, spot reports, sitrep, free text etc.
The ATHS tacfire is an older system, it was totally replaced by JVMF on later apaches, it has similar functionality and a dedicated MPD page.
As it has said, only late AH-64E's have link 16.
Also, non-radar AH-64Ds are still D models, not A, regardless if it has the mast mounted assembly installed.
The only 360° radar mode is for the air targeting (ATM) and air surveillance mode.