Regex issue! not getting intended output

Hi,

I checked using (?<=Scope and Approach)(.*?)(?=Scope Description) and looked at Extract word between two known words - #3 by qwerty123 as well but seems it is not working

Enclosing content document and also xaml file for your reference.
rfp-scope-ui.xaml (6.8 KB)

LWSystems-UI.pdf (59.5 KB)