Update / remove nodes values in .xaml document

I am about to create a robot that updates arguments and variables inside a .xaml file, using values from excel file. Do you have any idea on how to loop on marked nodes and update their values?

What I` ve already done is parsing .xaml file using deserialize activity, but I cannot retrieve any values from nodes using namespaces - the entire topic is difficult to me, since I am a begginer in UiPath automation.

Your assistance will be highly appreciated!
Ofc let me know whether you have any further questions.