My tablet comes with a blue shade to help with that maybe that might help if you get a tablet like that
At night, even the lowest level of brightness seems actually pretty bright. But you can do this to lower the brightness further: Settings > General > Accessibility > Zoom. Tap the screen once using three fingers. You'll be able to zoom out by tapping full-screen zoom, or use the slider below the controls. Choose Filter > "Low Light". Ta-da. No "night mode" needed.
That's not bad actually ^ but I just used greyscale filter instead, it basically works like night mode. Thanks for reminding me about the filters, I forgot about those
I love darkness, especially to sleep. There's nothing better like sleeping in the purest darkness with not a single spot of light. Respect op, support, why not? It's too bright.