I am divorced but filing jointly this year as the divorce was not final before December 31. Can my ex-spouse sign the tax return without having full access?

I am filing jointly for 2021 as that provides a better tax result, but due to the terms of the divorce, my ex cannot have access to my finances, nor can I have access to hers. Is there a way that she can just review the tax return and sign it on TurboTax without gaining full access to TurboTax so she doesn't try to change anything?