Definition of FUNCTIONAL—which was the actual word used!
1....having a special activity, purpose, or task; relating to the way in which something works or operates.
For example: the liquidmetal midframe is a functional part of the iPhone. Its special task is both strength and to allow greater access to the 5G signal. It definitely relates to how the iPhone operates and performs—it is integral.
Your “wordsmithing” was to use a different word (function vs functional) and then act as if it was pertinent to the PR. Also synonyms don’t show definitions.