Is there a specific screen brightness setting for viewing sRGB correctly?

Short Answer

The "official" sRGB display spec is a peak white is 80 cd/m², with a 2.2 display gamma, per the IEC standard.

Longer Answer

Needless to say very few people set at 80 nits except at night/when dark.

120 cd/m² is a common reference level. This assumes that the surrounding diffuse reflective field of view of the room is about 24 cd/m² (20% of peak white).

Some people set to 160 cd/m² -- even 220 cd/m². The ambient lighting will dictate a lot of where you want to set your monitor peak white.

Either your contrast/brightness controls or if your monitor has a direct gamma control will probably also need to be adjusted along with its brightness and the ambient light for the same/appropriate perceptual intent.

A brighter display or a darker room, or both, usually results in increasing the display gamma for the same perceptual intent.

A darker display or a brighter environment usually means a need to flatten the gamma, i.e. lowering it.

Assuming you have a good quality hardware display calibrator like an Xrite I1 Display Pro (or whatever they are calling it today, LOL), you can measure your ambient illumination as well as the display—so you can dial all these in to work properly together.

If you don't have a display calibrator, but you have a good spot meter, you can set the display to #ffffff and adjust peak white measuring cd/m² with the spot meter.