Photoshop 2023 won't use dedicated GPU when "Auto Show The Home Screen" is disabled.

In addition to D.Fosse's helpful reply here's some helpful links I saved for anyone with GPU issues

Here are some suggestions from Adobe for GPU issues.

First check the system requirements: https://helpx.adobe.com/photoshop/system-requirements.html

next:

https://helpx.adobe.com/photoshop/kb/troubleshoot-gpu-graphics-card.html

https://helpx.adobe.com/photoshop/kb/photoshop-cc-gpu-card-faq.html

I hope this helps
neil barstow, colourmanagement net - adobe forum volunteer - co-author: 'getting colour right'
google me "neil barstow colourmanagement" for lots of free articles on colour management

It sounds like you have a laptop with dual GPUs. GPU conflicts is a known potential problem.

You may need to disable the integrated GPU completely. See section 6 & 7 here:

https://helpx.adobe.com/photoshop/kb/troubleshoot-gpu-graphics-card.html