Enable max nits "sunlight" brightness?

I noticed with auto brightness off and max brightness enabled the screen still gets brighter in sunlight. Even when i turn outdoor mode on it is not as bright as when the sun hits the sensor. I want to know if there is a way to enable this maxed out brightness setting without it turning off everytime a shadow is cast over the sensor. A max "nits" toggle of some sort. Using high battery is not an issue when i need this mode is when im riding in a work truck so i have a charger. Thanks for any input.

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