Reddit reply in r/AcademicQuran: response refutation a moderator from — May 30, 2024 | Ali Shukri Amin

Some of the narrations they use as evidence:
.‏"

Narrated 'Ubaidullah bin `Abdullah:
Ibn `Abbas said, "When the ailment of the Prophet (ﷺ) became worse, he said, 'Bring for me (writing) paper and I will write for you a statement after which you will not go astray.' But `Umar said, 'The Prophet (ﷺ) is seriously ill, and we have got Allah's Book with us and that is sufficient for us.' But the companions of the Prophet (ﷺ) differed about this and there was a hue and cry. On that the Prophet (ﷺ) said to them, 'Go away (and leave me alone). It is not right that you should quarrel in front of me." Ibn `Abbas came out saying, "It was most unfortunate (a great disaster) that Allah's Messenger (ﷺ) was prevented from writing that statement for them because of their disagreement and noise. (Note: It is apparent from this Hadith that Ibn `Abbas had witnessed the event and came out saying this statement. The truth is not so, for Ibn `Abbas used to say this statement on narrating the Hadith and he had not witnessed the event personally. See Fath Al-Bari Vol. 1, p.220 footnote.) (See Hadith No. 228, Vol. 4).

Sahih

Sahih al-Bukhari, 114
In-Book Reference: Book 3, Hadith 56
USC-MSA web (English) reference: Vol. 1, Book 3, Hadith 114 (deprecated numbering scheme)

Al-Bara’ b. ‘Azib said: God’s Messenger went to perform an ‘umra in Dhul Qa'da, but the people of Mecca refused to let him enter Mecca till he had made an agreement with them to enter (i.e. in the following year) and stay three days. Then when on writing the document they wrote, "This is what Muhammad God’s Messenger has agreed,” the Meccans said, “We do not acknowledge it, for if we knew you were God’s Messenger we would not prevent you; but you are Muhammad b. ‘Abdallah.” He replied, "I am' both God's Messenger and Muhammad b. ‘Abdallah.” He then told ‘Ali b. Abu Talib to obliterate "Messenger of God”, and when he protested, "No, I swear by God, I will never obliterate it,” God's Messenger took it, and although he did not write well, he wrote, ‘‘this is what Muhammad b. ‘Abdallah has agreed. The only weapon with which he will enter Mecca will be a sword in the scabbard; if any of its people wishes to follow him he will not take him out; and if any of his companions wishes to stay in it he will not prevent him.” Then when he entered and the appointed period elapsed they went to 'Ali and told him to tell his friend to leave them for the appointed period had elapsed. So the Prophet went out.
(Bukhari and Muslim.)

Mishkat al-Masabih 4049