God has a covenant with Israel. We share some of the benefits. Romans and all the covenants God gave to the patriarchs are yet to be completed. They will be. That takes nothing from the glorious blessings we share .
“God has a covenant with Israel.” - Yes,and we have been grafted into it. There is only one covenant in effect today, the Covenant with Moses was fulfilled (completed) under Christ. It ended when he shouted, “It is Finished”, breathed his last, and the curtain was torn from top to bottom. Those still living under the law will die under the law. Those living in Christ will never die. The time for salvation is NOW!