As it’s newly built you will probably have to order standard broadband first, once the line is active other options should become available to you. As long as the street cabinet is not full.
Make sure the developer has registered the new properties with Royal Mail, if not you can do it yourself.
BT can still provide services but it could have to be done in 3 parts, 1st get a new line installed, there will be a connection/installation fee, once done you can add broadband, although fibre will most likely not be an option, once you have standard broadband you should be able to upgrade to fibre.
Once done that's it though, come renewal you'll have options as your address will be Gold by then.
You need to get the phone line first
BT should be able to offer the same service as SKY as they use the same Openreach database.