A lot depends on how much sun they are getting in the current location.
Are they auto plants?
If they are photo then you have from now till October to get the most out of them. I definitely want to follow along.
Going from indoor to outdoor you usually go through a process of sun hardening the plants. I don’t have a link handy as I’m mobile but basically direct sun on seedlings can be rough and you want to ease into it. You’re starting with sun light through the window but still filtering some UV through the glass.
Start by giving them an hour or two outside when you can. Build up their strength.
If the balcony faces south you should be getting enough hours of lite to be fine.