P: Password/Touch/Face ID to open Lr

It seems incredible to me that there is no such option for face id or password protection for Acrobat Premium.  So much so that I've wasted a considerable amount of time trying to contact Adobe to find if there is such a feature unknown to me.  I scan all sorts of sensitive documents and anyone who has stolen my phone and gained access could easily download my taxes, banking information, prescriptions, etc.  I don't want to just trust that some thief won't be able to hack the login---I want additional security for Acrobat.  Otherwise I may have to discontinue the use of the app.