There's a number of different covenants that unfold in the Torah and another specifically in 2 Sam 7. Some of which include;
Gen 3:15 ~ where the son of the woman would destroy sin and death (fulfilled in Jesus in us)
The Abrahamic covenant ~ The everlasting covenant of Children and eternal Life (Gen chapter 15 through 49)
(fulfilled in Jesus in us)
Marriage Covenant to Israel ~ Where God married Israel, divorced her, then promised to remarry here in a New marriage Covenant (as referred to in Jer 31: 31-34)
(Fulfilled in Christ's marriage in us)
The Everlasting House and Throne Covenant God made with David in 2 Sam 7.
(fulfilled in Christ now on the Throne over His Christian/Israel House)
There is also a levitical salt covenant that is fulfilled upon us as the "salt of the earth" Jesus told us we are. There are some other smaller covenants as well.
They all pointed forward to their fulfillment in Jesus. We see it all 2000 years hence fulfilled, being fulfilled and continuing to be fulfilled in Christ's Body of believers.
All aspects came together in Christ. We now, today, are welcomed to come be a part of it all, a free offering, all has been completed and prepared for us to sit and eat with Him now
Blessings in the New Covenant in Christ's Blood!