Of course it was an issue...Jesus taught that marriage was between a man and a woman...Sexual relations outside of that bond were a sin...That covers 'everything'...
Plus, Jesus was a Jew under the Law teaching the Jews...In the Law homosexuals are condemned...
And of course Paul who was taught from the lips of the resurrected Jesus had plenty to say about it...
You don’t seem to have understood what I meant by “not an issue.”
I meant “not a matter of controversy.”
Jesus was a Jew, speaking throughout his public life almost exclusively to Jews. There was absolutely no reason for him to preach about matters that absolutely everyone agreed about.
Understanding when some matter was not a matter of controversy is essential for understanding that certain silences in Scripture do not signify what many people claim they signify.
Paul was preaching and writing to pagans, many of whom practiced things that no Jew or Jewish Christian would have ever considered. Paul was preaching straight Jewish morality, to pagans. It is highly unlikely that Jesus ever said a word in his preaching about such sins.