1. No text says " Christ is the fulfillment of the Sabbath " not even the ones you provide above.
2. No NT text says Christians assembled every week-day-1 not even the ones you provide above.
3. No NT text says to "assemble on the day of Christ's resurrection each week" not even the ones you provide above.
4. No NT text says "the day of Christ's resurrection is the Lord's day" not even the ones you provide above.
My guess is that you might also agree to these obvious facts since you never provide a text saying any of that.
Strawman. . .which demonstrates nothing.
No text says "God is sovereign," but he is anyway.
No text says "Jesus is divine," but he is anyway.
No text says, "God is Trinity," but God is anyway, etc., etc., etc.
Hebrews is addressed to NT Hebrews who, because of persecution by the Jews and disinheritance by their families,
were considering a return to Judaism. It contains five spiritual warnings about the drastic spiritual consequences
of such a decision, of which the third, Heb 6:4-6, is the most dreadful, and of which
Heb 4:1-13 is the second,
reminding them of the consequences of 40 years wandering in the dessert for their refusal to enter Canaan, the land of the promised
rest
(Dt 12:9-10, 25:19; Josh 1:13, 11:23, 21:44, 22:4, 23:1), and
warning them not to fail to enter into God's rest again.
Heb 4 is about the (spiritual) salvation
rest of the NT (4:1-3, 6-7, 9-10), which is God's own
rest (4:10)
in which they are invited to share (4:11), prefigured, foreshadowed in Canaan, the OT (physical)
rest after 40 years
of wandering in the wilderness, promised by God but only partially and temporarily fulfilled in Canaan (Heb 4:8),
because God spoke of another day, "Today" in Ps 95:7-8 (4:7) of Sabbath-
rest for the people of God (4:9), in the NT (4:11).
What is the
nature of this
rest of "another day, Today" for the people of God spoken of in Ps 95:7-8,
and what is it a
rest from, to which Heb 4:1-13 is referring?
The
nature of the
rest is spiritual, it is
rest in Christ.
It is rest
from our own work to save, and
rest in Christ's work which saved us.
Christ is the fulfillment of the Sabbath, set apart (sanctified) and given for rest (Ex 23:3; Dt 5:14),
which is why we find the NT Christians
assembling on the
day of Christ's resurrection, the Lord's Day (Ac 20:7; 1Co 16:2; Rev 1:10).