How to use:
Under Custom Options. Select the modifier (e.g. Left Alt) which allows you to hide non-Mirror Image Nameplate.
When you are holding onto that specific modifier key (e.g. Left Alt), all nameplates aside from Mirror Images will be hidden. Upon releasing the modifier key, all nameplates will be un-hidden once again.
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Adapted from retail Quazii's Explosive Orb hide nameplate, which is adapted from an original larger package of M+ WAs released by Jodsderechte - full credit goes to him, and his original package titled "M+ affix helper" that was released for Shadowlands.
Quazii's Explosive Orb hide nameplate: https://wago.io/eUbnjH2Ey
Link to original WA package: https://wago.io/AffixHelper