No Im correct, like the passover, any and all of the nation of israel could partake of the passover, even the non elect jews who were of Abrahams physical desecent, but to partake of the Lords supper. one would have to be a believer in Christ, so that would be only the remnant within the nation, just using that for an example. Thats because while the OT Covenant was in tact, the Nation was Gods chosen Covenant People, redeemed from egypt, but following the Death of Christ, the nation lost that distinction, hence it was only temporary, until the time of reformation, which was Christ Heb 9:10
10 Which stood only in meats and drinks, and divers washings, and carnal ordinances, imposed on them until the time of reformation.
Heb 8:7-8,13
7 For if that first covenant had been faultless, then should no place have been sought for the second.
8 For finding fault with them, he saith, Behold, the days come, saith the Lord, when I will make a new covenant with the house of Israel and with the house of Judah:
13 In that he saith, A new covenant, he hath made the first old. Now that which decayeth and waxeth old is ready to vanish away.
It was temporary