Looking for those red letters
The significance to her that Jesus didn't speak on it was that He had "bigger fish to fry." In other words, more important matters. This doesn't mean that Jesus' silence on a matter is an endorsement of it. Also, the whole word of God is God-breathed, Spirit guided and maintained by the Lord. If the apostles spoke out against homosexuality, then that is God working through them to show that He still, in the NT, is in opposition to homosexual relations as it contradicts the order He established between a man and woman becoming one flesh.
Jesus, Himself, stood for marriage between a man and woman quoting the OT in speaking on divorce, and if you are going to consider anything of what Jesus did or didn't say, He spoke positively on heterosexuality as God ordained. It is like someone speaking for unity and because they said nothing about racism you imply a significance that they spoke nothing on racism but spoke on unity. They spoke on unity! They don't need to address racism because that is not unified. In the same way Jesus spoke on heterosexuality and therefore doesn't need to address homosexuality because He already presented what He is for.