Shake everything with ice, remove the ice and shake one more time, and serve with a bit of cinnamon on the foam.
Definitely not a summer cocktail, but the weather here has been rainy and grey, so I have to adapt! The rum and Bénédictine combination works really well, and the smell of cinnamon is nice. I'm not sure I fully taste the orange bitters though, maybe it would have been better on top of the foam with the cinnamon.
Looks nice! Maybe a little orange zest microplaned on top would give you the orange you are after.
Does aquafaba work well for you? I like egg white in cocktails but then end up with yolks so usually I only use 'em when I have whites from using yolks to make something. Beans I love so more often have bean water, and I have a vegan kid who likes a fancy drink.