What does “5339 之（代） 5340 之（助）” mean in the lists of characters for the new HSK 2021?
Possibly there is a distinction between a 代名詞 (pronoun) vs. 助詞 (particle). The 3rd person pronoun usage of 之 and ordinary relational connector 之 might be sufficiently different to be considered separate.
There might be a separate entry for 之 (動) for 動詞: the verb 'to go', also a meaning of 之.