However, Hebrews goes on to say that Abraham, Isasac and Jacob did receive the end of those promises of an "everlasting inheritance" (Ge 13:15, 17:8).
Even though they never possessed Canaan (Ac 7:5, Heb 11:13, 19), they received it in the heavenly land/country (Heb 11:10, 16).
The eternal (everlasting) title was to heavenly land, not to earthly land.
They received the promises...yes. But they never received the fulfillment or end of those promises. That those promises were eternal, and everlasting...yes.
A promise was for the land for ever. (Gen. 13:15) "For all the
land which thou seest, to thee will I give it, and to thy seed
forever." And as you point out in (Acts 7:5), Abraham never obtained the fulfillment of that promise. "And he gave him
none inheritance in it, no, not so much as to set his foot on:
yet he promised that he would give it to him for a possession, and to his seed after him, when as yet he had no child."
In the verses (Heb. 11:10, 13, 16), the desire from those to seek a heavenly city, one whose builder and maker is God, doesn't need to mean a city or country not found on earth. It just needs to be one whose builder and maker is God. A heavenly city on earth. And Abraham had already been told that it would be at least 400 years before the land process would even begin. (Gen. 15:13-16) And the call of Abraham was the beginning of the promises, and the land was part of those promises.
Those promises are first given in (Gen. 12:1-3). If all the land that Abraham saw was promised to him forever, then if God doesn't give him that land forever, He has gone back on His Word. And I'm sure you don't believe that, as neither do I.
That is my understanding. Pleased to meet you.
Lees