That’s all true. Take note that the other ten tribes of the northern kingdom are referred to by Jesus as the “lost sheep of the house of Israel” (Matthew 10:6/15:24).
Also, Melchizedek preceded Judah and Levi, i.e. the tribes, insofar as Abraham being a contemporary. The epistle to the Hebrews confirms Melchizedek’s identity.
Yes... The reason Christ called them 'lost sheep of the house of Israel' is the punishment placed upon them because of Jeremiah 3:8... The Minor Prophets said they would not know who they are... But one can get clues, from the promises given to each individual tribe, Genesis 49:1 And Jacob called his sons, and said, "Gather yourselves together, that I may tell you that which shall befall you in the last days..... Each son=tribe is listed and their promise foretold.
Also, Melchizedek preceded Judah and Levi, i.e. the tribes, insofar as Abraham being a contemporary. The epistle to the Hebrews confirms Melchizedek’s identity.
I do not get the idea that Melchizedek was in flesh.