Just looking at leaves it tricky. I have the Abelmoschus moshatus, I added photos to the Database. The leaves are constantly changing on my plant.
My Ablemoschus moshatus is quite short and the 'mystery plant' is tall, more like the Red/Ruby Okra or the H. sabdariffa.
As soon as the mystery plant makes flowers we should be more positive of the ID.
This is one of the 'funnest' IDs recently.