In Best Friends, the alphas have dicks. I didn't catch it at first either, but go re-read the first couple chapters again.
In Perfect Heroine Wants to Possess Me, they don't, but honestly in that story (and many Chinese ABO stories), they mainly just use the pheromone stuff as a way to get around having to talk about lesbian sex, which is a taboo topic to depict there.
In this story, the alphas have dicks. Tang Chao physically holds her hard-on down in an earlier chapter, did everyone miss that?
Edit: Went back to find the exact spot. It's in Chapter 5, about 1/3rd of the way through. Tang Chao is in the bathroom in a pink dress. Watch her hands - it's really obvious.