Peter and Paul preached different kingdoms.
The twelve preached the kingdom gospel of the earthly Davidic kingdom.
[Luke 9:1-2 KJV] 1 Then he called his twelve disciples together, and gave them power and authority over all devils, and to cure diseases. 2 And he sent them to preach the kingdom of God, and to heal the sick.
Ezekiel speaks of the Davidic kingdom
[Ezekiel 37:24-28 KJV] 24 And David my servant [shall be] king over them; and they all shall have one shepherd: they shall also walk in my judgments, and observe my statutes, and do them. 25 And they shall dwell in the land that I have given unto Jacob my servant, wherein your fathers have dwelt; and they shall dwell therein, [even] they, and their children, and their children's children for ever: and my servant David [shall be] their prince for ever. 26 Moreover I will make a covenant of peace with them; it shall be an everlasting covenant with them: and I will place them, and multiply them, and will set my sanctuary in the midst of them for evermore. 27 My tabernacle also shall be with them: yea, I will be their God, and they shall be my people. 28 And the heathen shall know that I the LORD do sanctify Israel, when my sanctuary shall be in the midst of them for evermore.
Paul spoke of a heavenly kingdom.
[2Ti 4:18 KJV] 18 And the Lord shall deliver me from every evil work, and will preserve [me] unto his heavenly kingdom: to whom [be] glory for ever and ever. Amen.
Paul taught that the church in this dispensation will be seated in heavenly places.
[Ephesians 1:3 KJV] 3 Blessed [be] the God and Father of our Lord Jesus Christ, who hath blessed us with all spiritual blessings in heavenly [places] in Christ:
[Ephesians 2:6 KJV] 6 And hath raised [us] up together, and made [us] sit together in heavenly [places] in Christ Jesus:
The kingdom of God includes heaven and earth.
[1Chronicles 29:11 KJV] 11 Thine, O LORD, [is] the greatness, and the power, and the glory, and the victory, and the majesty: for all [that is] in the heaven and in the earth [is thine]; thine [is] the kingdom, O LORD, and thou art exalted as head above all.
[Mat 6:10 KJV] 10 Thy kingdom come. Thy will be done in earth, as [it is] in heaven.
God has reconciled both heaven and earth. We should not confuse our place in His kingdom.
The twelve preached the kingdom gospel of the earthly Davidic kingdom.
[Luke 9:1-2 KJV] 1 Then he called his twelve disciples together, and gave them power and authority over all devils, and to cure diseases. 2 And he sent them to preach the kingdom of God, and to heal the sick.
Ezekiel speaks of the Davidic kingdom
[Ezekiel 37:24-28 KJV] 24 And David my servant [shall be] king over them; and they all shall have one shepherd: they shall also walk in my judgments, and observe my statutes, and do them. 25 And they shall dwell in the land that I have given unto Jacob my servant, wherein your fathers have dwelt; and they shall dwell therein, [even] they, and their children, and their children's children for ever: and my servant David [shall be] their prince for ever. 26 Moreover I will make a covenant of peace with them; it shall be an everlasting covenant with them: and I will place them, and multiply them, and will set my sanctuary in the midst of them for evermore. 27 My tabernacle also shall be with them: yea, I will be their God, and they shall be my people. 28 And the heathen shall know that I the LORD do sanctify Israel, when my sanctuary shall be in the midst of them for evermore.
Paul spoke of a heavenly kingdom.
[2Ti 4:18 KJV] 18 And the Lord shall deliver me from every evil work, and will preserve [me] unto his heavenly kingdom: to whom [be] glory for ever and ever. Amen.
Paul taught that the church in this dispensation will be seated in heavenly places.
[Ephesians 1:3 KJV] 3 Blessed [be] the God and Father of our Lord Jesus Christ, who hath blessed us with all spiritual blessings in heavenly [places] in Christ:
[Ephesians 2:6 KJV] 6 And hath raised [us] up together, and made [us] sit together in heavenly [places] in Christ Jesus:
The kingdom of God includes heaven and earth.
[1Chronicles 29:11 KJV] 11 Thine, O LORD, [is] the greatness, and the power, and the glory, and the victory, and the majesty: for all [that is] in the heaven and in the earth [is thine]; thine [is] the kingdom, O LORD, and thou art exalted as head above all.
[Mat 6:10 KJV] 10 Thy kingdom come. Thy will be done in earth, as [it is] in heaven.
God has reconciled both heaven and earth. We should not confuse our place in His kingdom.