From pentecost, when believers were first baptized into the body of Christ - which was a Sunday - onward - the NT records believers gathering on the first day of the week.
Yes, a Apostles went on the sabbath to witness to gatherings of Jews, as commanded of them.
That Sunday gathering for Christian worship continues onward in the early church record for 300 years.
You’ve made up an argument about the authority of Rome being necessary to change to Sunday worship that is simply false.
It isn’t credible.
There was no decree issued in the NT. The Holy Spirit came on Pentecost.
No Rome needed.
That is all, my friend; have a good night.