If you set this project up with two section players, and use divisi to split them out as and when needed, then yes you can customise the staff labels at each divisi change.
You can hide empty staves to hide the T/B staves when they don’t have content.
This was recommended to you in your earlier thread, so do go back and reread the advice given to you. (I see you commented on that thread more recently than this one: if you can try to keep your questions on the same topic to the same thread, or make it clear whether you still need help in a new thread, that would be very helpful just now as we are experiencing a high level of activity here!)
If any of it isn’t clear, feel free to ask for a follow up.