Nor is an instruction needed.
There is absolutely no NT Scripture reason for believers to worship on a particular day of the week - other than the ones I mention, foremost being that it is the Day Christ rose from the dead.
It doesn't displease God to worship on every day or one day.
No authority nor permission is needed - other than the freedom of the believer and the command to assemble together.
That later in history the Roman church institutionalized Sunday for itself is irrelevant to believers in Christ, who are not bound by anything Rome declares or believes.
Who recognizes any authority of Rome, other than romans??
As such, your argument carries no weight, except to those under the power of Rome.
I think you're being disingenuous. (Because it seems to me that you can arrive at your own conclusions and then cherry pick those parts of Scripture that seem to support them.)
Christ Himself kept the Jewish Sabbath; He had multiple run-ins with the Scribes and Pharisees on this day, who took issue with His performing miracles on that day. Despite having had ample opportunity, He never once stated that the Sabbath was no longer binding.
If our interpretation of Scripture allows us to reach a conclusion by considering what it doesn't say, we could all read the Bible and come up with a million different understandings of what it actually meant.
I can tell you that damned few FR Catholics recognize the 'authority' of their current pope.
Would that be the same thing??