In his Rethinking the Dates of the New Testament (an absolute must-read), Bernier writes
Didache 8.2, which introduces as
Gospel material a version of the Our Father very close to that of Matthew
6:9-13, seems especially more intelligible if dependent upon Matthew’s Gospel
than if independent. (Jonathan Bernier, Rethinking the Dates of the New
Testament: The Evidence for Early Composition [Grand Rapids, Mich.: Baker
Academic, 2022], 253; Bernier dates the Didache to 60-125 and Matthew to 45-59)
This is significant as it shows that the doxology in the Lord's Prayer as found in the Didache is very early. On the doxology in 3 Nephi, see: