@Hila’s idea will probably work for what you want.
If you get rid of all the messages and only upload the phone screen background, you can use a code in your script to make it look like text message.
To put it in your script, you type this:
set format phonetext
And then when you want to go back to the real scene, you type this:
set format cinematic
There’s more info on it here. If you use this, you don’t need to worry about approvals