Send to Photoshop as SRGB

To convert to sRGB, in Photoshop  you need to use Convert to Profile and select sRGB from the RGB dropdown options.

Opening an image as sRGB may not be a good idea anyway. I assume you want to edit image in Photoshop (otherwise you could simply export a copy). Editing is always better in 16 bits and a large color space. If your final image needs to be in sRGB for whatever reason, then convert the final result to sRGB in Photoshop, not the input image.

Only way is to either export to RGB tiff, open that up in Photoshop and import the saved file to Lightroom, or to simply change the colorspace in Photoshop itself. Lightroom Cloudy lacks these options ostensibly because there was an effort to keep the interface as easy to approach as possible as newcomers complained about the steep learning curve of Lightroom and the myriad of options to choose from before the split into Classic and Cloudy.

TBMK I do not believe you can. Lr defaults to Profoto TIF when the image opens in Ps. (Even changing the 'Color Settings' in Ps to sRGB did not change the default from Profoto.)

You can do either-

1) [Save] the image back to Lightroom, then [Export] a JPG in sRGB from Lightroom, or

2) While in Ps [Export] as JPG sRGB. (This will NOT return the JPG to the Lr library.)

Why must you 'open' an image in the sRGB color space?

Other 'color' experts may have answers!