Let's look at the covenant in question here which is The Abrahmic Covenant. Not the Mosaic or Davidic, but focus on the Abrahamic covenant. It's also referenced in the NT, is always referred to as "the EVERLASTING covenant", etc. And is the covenant received by faith & the one we are in a sense (by type) grafted into as Gentiles as we believe God (the Gospel) by faith also, as is clear throughout the NT. As you read the initial call of Abraham in Genesis 12 & the through to the first covenant in Genesis 15 where GOD Himself Puts Abraham asleep and GOD ALONE "walks" between the cut in two bleeding animals on the "table of covenant" to say in a sense "if I don't keep my end of this covenant, may I be cut in two like these dead animals". And not only that, but God put Abraham asleep & God Alone walked through the covenantal table for both ends of the covenant. Abraham never even did. God was (in type) saying, I will keep my end, & by the power of my righteous right hand, I'll keep your end too (can anyone keep any promise or covenant without the Lord's Power? Of course not). There is never one single "if" in all of the text there. God keeps His everlasting covenant. You won't find an "If" anywhere there. I just looked again. God was saying He would keep it Himslef for His own Name's sake no matter what. He is able & He is faithful.
Then, in Genesis 17, God appears to Abraham again & speaks another covenant before Abraham. He never puts Abraham asleep, & the common understanding of the text & the common covenantal understanding of the era was that Abraham would have made the covenantal table, spread out the table of covenant of dead animals split in two, walked through the blood in the middle, splashing up on the hemn of his robe, as to say, "if I don't keep my end of this covenant, may I die & bleed out like these animals". God starts out discussing HIS END of the "Everlasting Covenant" (the land as "and EVERLASTING possession", etc.) & then God details Abrahams part: circumcision. Now in the NT we see that circumcision of the flesh was no longer required (our part) but circumcision of the heart by faith (symbolic of justification followed by sanctification), but I don't see any text anywhere in the NT where God's promises of this "EVERLASTING COVENANT" are repealed. Ever. Anywhere. Also, it is worth noting that there also NO "IF"s found anywhere there in Genesis 17. God's promises & provisions in the Abrahamic Covenant are received by faith, irrevocable, unconditional (once entered upon TRULY by faith & through Blood, now namely the Blood of Jesus), etc. Of course we still have things to do on our part, but "He remains faithful, even when we are faithless". Thank God! It's for His name's sake, His reputation as a covenant keeping God, & the things so amazing in His Gospe plan for a rebellious mankind, that "even the Angels long to look into these things".
So, when you speak of "IF"s, as in "conditions" of covenant, you are not referring in context to the Abrahamic Covenant, but most likely the Mosaic covenant. The Law. And yes, it was conditional, no one could keep it perfectly, & it was the schoolmaster to bring us to see our need for Christ the perfect Lamb of God which was the covenant by faith in which God always keeps His promises, even when we fail, fall, stumble, etc.
I'm sure others can offer even better/more to the discussion, but I know understanding covenant in the ancient Way it was spoken, carried out & understood by its original audience is important. It's more than just a "contract" as we would see it. And God always keeps HIS covenant promises He gave to Abraham & His descendants after him. Always. He always referred to His end of keeping the covenants to Abraham as "EVERLASTING" (literally forever, non-ending), but never makes such specific statements to anything on our end, nor to Moses concerning the Law (the conditional Mosaic covenant). Not that I see when reading the text. Again, I don't understand everything, but I don't see a single "IF" in al of the Abrahamic Covenant in scripture in Genesis 12-19. I only see unconditional language on God's part, see the Hebraic picture of it in God putting Abraham to sleep & coming down & walking through the covenant HIMSELF alone, & see the word "EVERLASTING" repeatedly when God is referring to His part of keeping the covenant.