Hi @maria c thanks for posting in the community! Unfortunately there isn't currently a way to hide tabs. However it is possible to rename tabs which may be helpful for differentiating between WIP tabs and tabs that are ready. 

That said I can certainly understand how that feature would be helpful in documents with many tabs. Would you mind adding your idea to our feature request form? Ideas submitted to this form are passed on to the product development team for their consideration.

Thanks for your request and I apologize for any inconvenience this causes you.