All simply local gatherings of the one "body of Christ". The ekklesia (an assembly of those called out) of Christ. Notice Paul simply addresses the ekklesia (those called out) who were in Corinth.
1 Corinthians 1:2 to the assembly of God that is in Corinth, to those sanctified in Christ Jesus, called saints, with all those calling upon the name of our Lord Jesus Christ in every place -- both theirs and ours:
>>See Revelation 2-3. These have been viewed as ‘types’ of churches.<<
No " types of churches" there. Only assemblies of believers "called out" of the world by God who were either erring in one way or another or who were being faithfully to their "first love". Not one indication of " denominations".
Of course all believers in Christ are part of the body of Christ.
However, it is quite clear, even early in the book of Acts that there were differences in emphases. In Acts 15 it becomes really clear that the practices of the Jewish church were quite different from those of the Gentile church.
And, as I’ve pointed out, there are other differences that become pronounced as we head into the book of Revelation.