Your plumeria all look so good, Tarev. Most of my rooted cuttings and seedlings, all under 3' tall, show little sign of dormancy but my large plants are all getting those yellow leaves and dropping leaves. I still have some in bloom and several more with the beginnings of inflo. Any that have flowers or have stalks, regardless of size, will overwinter in the solarium with lots of sun, warm temperatures, and watering. Hopefully, I will have flowers until the New Year.
I have unpotted most of my large and medium size plants, some 3 dozen of them, and they are all stacked under an oak tree. They will remain there for perhaps 2 weeks, losing most of their leaves in the process. Ultimately they will all be bagged and brought inside to overwinter.
Seedlings and rooted cuttings under 4' tall
Stacked