“VATICAN CITY, June 23 (Reuters) - The Vatican on Tuesday reaffirmed a long-standing rule that only an ordained priest or deacon can give a sermon at a Catholic mass, rejecting a request from German bishops to broaden the practice and allow sermons by women or other laypeople.”


MOST of it is in parables, the parts about Jesus and his life are personal testimonies of the disciples
Or not: https://factually.co/fact-checks/religion/gospels-where-written-by-whom-88e1e4
Are the gospels even considered part of the catholic canon?
they are different in styles because they are different people
Yes, they are
That does not answer these discrepancies:
They were written miles and years apart from each other.
Do your arms get tired carrying those goalposts?