Rather than 'open in Photoshop', try cropping in ACR which again, will allow you to zoom and crop at the same time. Then you're still in a raw, parametric workflow, the crop will 'transfer' to Lightroom Classic just fine. I know, its a PITA, but until Adobe updates Lightroom Classic to mimic ACR, and a request on their site will help, that's the best you can do.