What are you trying to gain from doing a SS ride fasted?
If the SS turbo rides are 1h, then really they're not fasted, as your body has enough fuel to run for 1h at near max pace. So you're doing them fuelled. Not fueling during them means that when you finish the ride, you'll be empty. So you either eat then or not. You're not going to be causing improved training adaptions. You're not going to be losing weight, becasue you'll be eating after.
If you want to lose weight, cut meal portions when you don't need the energy. Not when you do.
I generally don't eat after 7pm and I wake up around 6am and get on trainer around 6.15, so I figured my body would be pretty much out of fuel at that point. Does my body really still have fuel in it at that point? It doesn't feel like it does.
You're missing the point of sweetspot work though. It's meant to be making you faster, not improving fat oxidisation. You're mixing two quite different aims.
What are you trying to gain from doing a SS ride fasted?
If the SS turbo rides are 1h, then really they're not fasted, as your body has enough fuel to run for 1h at near max pace. So you're doing them fuelled. Not fueling during them means that when you finish the ride, you'll be empty. So you either eat then or not. You're not going to be causing improved training adaptions. You're not going to be losing weight, becasue you'll be eating after.
If you want to lose weight, cut meal portions when you don't need the energy. Not when you do.