Acts 2:33 does not answer the question. Paul said, "And the Scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel to Abraham beforehand, saying, “In you all the nations shall be blessed.” (Galatians 3:8 NKJV)
Blessed how?
..that the blessing of Abraham might come upon the Gentiles in Christ Jesus, that we might receive the promise of the Spirit through faith. (Galatians 3:14 NKJV)
Not all Hebrews (including Jews) have received the promise of the Spirit through faith in Jesus Christ.
Acts 10:44 While Peter was still speaking these words, the Holy Spirit fell upon all those who were listening to the message.
45 All the circumcised believers who came with Peter were amazed, because the gift of the Holy Spirit had been poured out on the Gentiles also.
Romans 11:24 For if you were cut off from what is by nature a wild olive tree, and were grafted contrary to nature into a cultivated olive tree, how much more will these who are the natural branches be grafted into their own olive tree?
Phillipians 3:5 circumcised the eighth day, of the nation of Israel, of the tribe of Benjamin, a Hebrew of Hebrews; as to the Law, a Pharisee;
You were speaking of all Hebrews. Not all have been saved, but you are speaking of a different new covenant meaning some people believe the fulfillment of the verse you quoted has not yet occured, while I showed it has. Some believe the new covenant has not yet come, but it did 2000 years ago. If you believe the new covenant has not come yet, you have a different new covenant than what the Bible speaks about.
You may be thinking of the following, which is not speaking of a different new covenant from what Jesus brought. I am not an authority on how this is fulfilled, but I know it is true.
Romans 11:25 For I do not want you, brethren, to be uninformed of this mystery—so that you will not be wise in your own estimation—that a partial hardening has happened to Israel until the fullness of the Gentiles has come in;
26 and so all Israel will be saved; just as it is written,
“THE DELIVERER WILL COME FROM ZION,
HE WILL REMOVE UNGODLINESS FROM JACOB.”
27 “THIS IS MY COVENANT WITH THEM,
WHEN I TAKE AWAY THEIR SINS.”