I've noticed that when I open a page in a preview, the theme changes from dark (based on my phone/browser settings) to light. I'm not sure why it's happening but it's not a great experience.
I'm good to not use the page preview, I just couldn't see anything about this happening.
The attached image shows the information for the browser and OS which I hope helps!
Not to throw an unwanted suggestion but would an OVHCloud eco server work for this?
I'm not an expert in any way but I've had no issues with my instance and it was a lot cheaper than anything else I could find.