Talk about turning a "blind eye"! First, you mean Isaiah 66:22, not v. 23. Secondly, to insist this is Isaiah pointing to the cross requires total ignorance of context of the passage, which begins several verses before.
Isaiah 66, NASB
18 "For I know their works and their thoughts; the time is coming to gather all nations and tongues. And they shall come and see My glory.
19 "I will set a sign among them and will send survivors from them to the nations: Tarshish, Put, Lud, Meshech, Tubal and Javan, to the distant coastlands that have neither heard My fame nor seen My glory. And they will declare My glory among the nations.
20 "Then they shall bring all your brethren from all the nations as a grain offering to the LORD, on horses, in chariots, in litters, on mules and on camels, to My holy mountain Jerusalem," says the LORD, "just as the sons of Israel bring their grain offering in a clean vessel to the house of the LORD.
21 "I will also take some of them for priests and for Levites," says the LORD.
22 "For just as the new heavens and the new earth
Which I make will endure before Me," declares the LORD,
"So your offspring and your name will endure.
23 "And it shall be from new moon to new moon
And from sabbath to sabbath, All mankind will come to bow down before Me," says the LORD.
24 "Then they will go forth and look
On the corpses of the men
Who have transgressed against Me.
For their worm will not die
And their fire will not be quenched;
And they will be an abhorrence to all mankind."
According to your interpretation, and given vv. 22-24, Israel should have been restored on a permanent eternal basis the day of the Cross. But instead she was utterly destroyed when Jerusalem fell to Rome, an empire fed up with insurrectionists and Israel's refusal to bow down to the emperor. Unlike v. 20, promising the Jewish people will be returned to the land, that fall of the City of David 40 years after the Cross, scattered the people from the land in the final diaspora for over 1,900, before the recognition of Israel as a nation again by the rest of the world.
The preterist belief system is seriously flawed, failing to accurately interpret Scripture and ignoring "inconvenient" passages that prove them wrong. Such as here, in your post.
Now what have you actually said re the Sabbath still remains for the People of God? Since verses 23,24 are YET to be fulfilled and as surely as Isaiah spoke as a prophet of the true God, it shall happen really and 'literally' which includes that both verses shall be fulfilled simultaneously which shall be with the Return of Christ Jesus?
Now whose bodies shall lie by the side as who, shall 'GO TO WORSHIP ON THE SABBATH" in that day?!