Maybe just choose DCI-P3 if you don’t specifically care, as that’s a wider gamut. Work in a wider color gamut (e.g. DCI-P3), export in sRGB if needed.
Dell’s own notes on your monitor suggests it as a good option:
”DCI-P3 (which offers nearly 25% more coverage than sRGB), enables a wider range of colors and is quickly becoming the color standard for creating and viewing content.”