If I was being asked to debug this for someone I know, my first two questions would be “did your phone say delivered?” and “does the recipient have a Mac/iPad/e

If I was being asked to debug this for someone I know, my first two questions would be “did your phone say delivered?” and “does the recipient have a Mac/iPad/etc that could’ve received the message?”; do you know the answer to either of these? I worry that sounds accusatory but that’s not my intention, I’m curious and too tired to attempt to reword it.