Just looking at the issues:
The law covenant was with all israel, even applied to The accepted Alien resident, all 12-13 tribes, but there was the covenant with the Levites, the Covenant with David. Priests & Kings.Since
The New Covenant has as one of its terms the "Fogiveness of sins" (not remembering them), it follows, all followers of Christ, all of the 'Israel of God' are in that all embracing New Covenant.
A smaller group would be in the Kingdom covenant and rule as Priests with Christ for a thousand years.
That is why there were partakers before there ever was an "anointing" of 120 out of perhaps 500.
Just looking at the issues, because if there was no talking snake, no sin to forgive and only the rule is left.