Thanks for reaching out, sola162.
It sounds like you're noticing some unusual behavior with your screen. We can help.
From your screenshot, it looks like you have Low Power Mode enabled, which might be related to the behavior. Among others, Low Power Mode reduces or affects these display features:
- Display brightness
- Display refresh rate (limited up to 60 Hz) on iPhone and iPad models with ProMotion display2
- Some visual effects
It is possible that turning off Low Power Mode could help. You can turn Low Power Mode on or off, go to Settings > Battery, and check out this article to learn more about what happens when you Use Low Power Mode to save battery life on your iPhone or iPad.
Hope that helps.
Take care.