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There’s a crosspost here: Shadowlands Macro API Bugs & Improvement Wishlist
Personally, I don’t understand what you’re after with regards to race/class/level/zone conditions. Also, conditions already test against your target, and any other valid units, when they’re targeted by a given condition set.
Your use case for a 2nd focus seems immediately solvable just with proper configuration of the existing party/raid/arena frames.
Search for icons would be nice. This functionality is already provided by some addons such as https://www.curseforge.com/wow/addons/macro-toolkit