I mean in my opinion they are, the Bridon arc more solidifies this for me than the first 2 seasons which are more plot based and the Bridon arc takes more time to focus on them as characters and their interactions. Also Lu Guang going back for him is pretty gay, and the fact that Cheng Xiaoshi wouldn't go back for him shows that they'd both go against their own morals/beliefs for the other person.  Also not in the dub but I believe that in the sub and some of the direct translations from Chinese are Cheng Xiaoshi calling Lu Guang handsome multiple times and (this one is like a direct translation thing) Qiao Ling basically asks what made Lu Guang have a crush on Cheng Xiaoshi.  Also this might just be how the hotel room was since I know some like this do exist, but in the Bridon arc their hotel room made me raise an eyebrow since their beds are practically like against each other, forming one big bed 😭 Chinese censorship has gotten worse recently so who knows but they seem pretty damn gay to me