From Rome’s Challenge: (there is not one biblical word about keeping Sunday in place of the 7th-day-Sabbath)
https://www.romeschallenge.com/downloads/RomesChallenge.pdf
“The Protestants claim to stand upon the written word only. They profess to hold the Scripture alone as the standard of faith. They justify their revolt by the plea that the Church has apostatized from the written word and follows tradition. Now the Protestant’s claim, that they stand upon the written word only is not true. Their profession of holding the Scripture alone as the standard of faith, is false. PROOF: The written word explicitly enjoins the observance of the seventh day as the Sabbath. They do not observe the seventh day, but reject it. If they do truly hold the Scripture alone as their standard, they would be observing the seventh day as is enjoined in the scripture throughout. Yet they not only reject the observance of the Sabbath enjoined in the written word, but they have adopted and do practice the observance of Sunday, for which they have only the tradition of the Church. Consequently the claim of “Scripture alone as the standard.’ fails; and the doctrine of “Scripture and tradition” as essential, is fully established, the Protestants themselves being judges.”
There is not one biblical word authorizing anyone to write a single word of the New Testament.
There is not one biblical word authorizing anyone to recognize a single book of the New Testament as inspired Scripture, except for a vague assertion that (some? all? which one?) of the Pauline epistles are "like the other Scriptures".
Sunday worship was settled doctrine a couple of centuries before the NT canon was definitively promulgated. You read an apostate Bible, collected and preserved by an apostate church, according to your own logic.