Not one of these verses say not to keep the Sabbath commandment according to its original stipulation. In fact, neither of these verses mention the Sabbath at all.
Yes, continues the way Jesus said it would be
Isa 56:1Thus says the Lord:
Isa 56:6 “Also
the sons of the foreigner
Who join themselves to the Lord, to serve Him,
And
to love the name of the Lord, to
be His servants—
Everyone who
keeps from defiling
the Sabbath,
And holds fast My covenant—
7 Even them I will bring to My holy mountain,
And make
them joyful in My house of prayer.
Their burnt offerings and their sacrifices
Will be accepted on My altar;
For
My house shall be called a house of prayer for all nations.”
8 The Lord God, who gathers
the outcasts of Israel, says,
“Yet I will gather to him
Others besides those who are gathered to him.”
God's Sabbath has always been a "holy convocation"
Lev23:3 gathering of His people (congregation)
Which the words of Jesus always coming true and why we see with the examples of the apostles continuing the Sabbath convocation with all nations (people) every Sabbath decades and decades after the cross just as Jesus predicted
Mat24:20 Mat21:13 Isa56:6-7 following in the example of Jesus
Luke4:16
Act 15:21 For Moses has had throughout
many generations those who preach him in
every city, being read in the synagogues
every Sabbath.”
Acts 13:42 So when the Jews went out of the synagogue,
the Gentiles begged that
these words might be preached to them the next Sabbath.
Acts 13:44 On the
next Sabbath almost the whole city came together to hear the word of God.
Acts 18:4 4 And he reasoned in the synagogue
every Sabbath, and persuaded
both Jews and Greeks.
Why the Sabbath continues for eternity, just as God said because He changes not,
Isa 66:22“
For as the new heavens and the new earth
Which I will make shall remain before Me,” says the Lord,
“So shall your descendants and your name remain.
23 And it shall come to pass
That from one New Moon to another,
And from one Sabbath to another,
All flesh shall come to worship before Me,”
says the Lord.