Why is the letter "haa" in the word "fawakihu" (fruits) in Surat As-Saffat not considered a pronominal "haa"?

The letter 'Haa' in "fawākih" (fruits) is an original part of the word, not a pronoun, as it is the plural of "fākihah" (fruit). The 'Haa' of pronominalization (haa al-kinayah) is an addition to the word's structure and refers to the singular masculine absent (person or thing).