But you don’t mention that Abhidhamma is classified at times as Tipitaka and at times as sutta.
Atthasalini (expositor) p. 32:
“Which is the Khuddaka Nikaya? The whole of the Vinaya-pitaka, Abhidhamma pitaka and the fifteen divisions excluding the four nikayas” p35 “thus as rehearsed at the [first]council the Abhidhamma is a Pitaka by Pitaka classification, khuddaka -nikaya by Nikaya clasification, veyyakarana by part-classification and constitues two or three thousand units of text by classification of textual units”
Thus Abhidhamma is also sutta.
Commentary to the Mahāparinibbānasuttaṁ (DN 16)
CatutthabhāṇavāraṁBut in the list [of four things] beginning with sutta, sutta means
the three baskets [Suttanta, Vinaya, Abhidhamma] which the three
Councils.
It is unfortunate that some can’t understand how profound Abhidhamma is and how it aligns exactly with what is real: what is here right now.
If they could they would see how Abhidhamma- pitaka , Sutta- pitaka and vinaya- pitaka are in agreement in every way, as they must be since they were spoken by the Sammasambuddha.