I saw this quote and thought it was pertinent to this topic.
There is primary evidence from the late 2nd century or early 3rd century which perhaps shows how iota was already associated with Jesus. A quote from Clement of Alexandria, who died in A.D. 215. This is part of his commentary on Luke 16. See “the iota of Jesus” part.
“Perhaps by the iota and tittle His righteousness cries, ‘If ye come right unto Me, I will also come right to you; but if you are crooked, I also will come crooked, saith the Lord of hosts;’ intimating that the ways of sinners intricate and crooked. For the way right and agreeable to nature which is intimated by the iota of Jesus, is his Goodness, which constantly directs those who believe from hearing. ‘There shall not, therefore, pass from the law one iota or one tittle,’ neither from the right and good the mutual promises, nor from the crooked and unjust the punishment assigned to them.” Clement of Alexandria
Fragments pg 578
For more on Clement
https://en.wikipedia.org/wiki/Clement_of_Alexandria#Theological_works