Preventing Welcome Screen Layout Changes When Using Roaming Photographer Mode

I'm using LumaBooth for Windows on a Microsoft Surface with a Nikon D7000 as my stationary photobooth.

I also want to run LumaBooth on an iPhone with a Nikon Z5 in Roaming Photographer Mode, using the same event.

The problem is that whenever I open the event on my iPhone, I receive a warning that the welcome screen was formatted for another device.

The iPhone automatically adjusts the screen layout to its dimensions. Unfortunately, this appears to affect the welcome-screen layout on my Surface, even when the Surface is operating in locked full-screen mode.

I don't need a customized welcome screen on the iPhone because I'm only using it for roaming photography.

Is there a way to lock or preserve the Surface's welcome-screen layout while allowing the iPhone to access the same event and gallery?

Alternatively, can I disable welcome-screen synchronization without disabling photo uploads?

Also, is there a way to save and restore a welcome-screen design without manually repositioning every element?

Thank you!