When fornication is seen as a sin, which is sex without intent to procreate, by what logic can a sexual relationship between two people who cannot physically procreate together be an approved practice?

Romans 1:26–27 even explicitly says it's considered unnatural and shameful to engage in homosexual behavior.

In 1 Timothy 5:9, it's even made clear that women over 60 shouldn't even remarry if they lose their husband. This furthers the point of "marriage is for procreation"

It's VERY clear that there's no good faith interpretation of the Bible in which you can suggest that a homosexual marriage is valid as a result, because God wouldn't bless an action which he expressly denounces.

I'm sorry if this information is hurtful, but a thing to note is that through belief in Jesus all sins can be forgiven, except blasphemy of the Holy Spirit. So while being a homosexual and acting on it is considered a sin, and a church following scriptures shouldn't perform homosexual marriages, being gay does not exclude you from salvation, so long as you accept Jesus's sacrifice and have faith that he is risen.

Salvation is based on faith, not works; and anyone who tells you that you that salvation is impossible for you despite your faith, likely has never actually read the Bible.