And this hadith

عن عائشة ؛ أنها قالت : كان فيما أنزل من القرآن : عشر رضعات ضعات معلومات يحرمن . ثم نسخن : بخمس معلومات . فتوفي رسول الله صلى الله عليه وسلم وهن فيما يقرأ من القرآن .
It just means that the prohibition of marriage due to breastfeeding is mentioned in the Quran in surat Anisa2 ayah23
which shows that
are not allowed to marry our sisters from God and the Messenger of God Pbuh explains this as 10times as minimum and then he told us after the people got used to this new law that even 5 is enough for marriage prohibition so
عشر رضعات ضعات معلومات
this law is mentioned in the Quran & explained by the Prophet Pbuh but they were never an ayah that is read in the Quran.
And finally God knows best