Thanks for keeping us posted, @ieelaf17-gmail-c.
I'm glad to know you're finally able to see the same total expenses between the mobile app and the desktop version in QuickBooks Online (QBO).
Meanwhile, I'll be adding this great Community resource in case you've got other QuickBooks concerns such as setting up payments, managing your income and expenses, running reports, etc. Please refer to this article for more details: Community help articles.
Feel free to visit us again if you have further questions. I'd be glad to help. Have a pleasant day.