Okay, clean a 16000 email backlog on a phone.
On her phone.
Without her computer logged into her email.
Without her phone.
"I can do this for you, but I will need to use your computer to do it, and I will need you to read me off a bunch of 2FA codes in all likelihood, so you can either give me your phone or you can sit next to me while I do it. Oh, and they're your emails, so you may as well pull up a chair or I'm just going to have to guess whether you care or not."
My time is valuable too. You want me to do it, you help.
Can confirm this is an absolutely terrible thing to do on the phone unless you use the web UI and know how to create filters/rules