As a huge B&B fan I can only agree. Unlike other soaps, B&B never had any viable, long-term gay romances. Karen and Danielle (Caroline's mothers) was the only gay couple I remember in 38 years, and it was a very secondary, rushed and short-lived storyline. But still no gay males.
Joshua is gorgeous (though my favorite is Matthew Atkinson) and his character gave me gay vibes from day-1. The whole romance with Luna was kinda boring. He should have come back with a guy or they should have brought another young man for him. Very big missed opportunity. It can still happen I guess.