Copying to where from where? Perhaps provide the steps you are taking.
Make edits and adjustments to one picture then copying all those settings to another picture? I am not sure i can explain it any better.
I just switched to Lightroom Classic and it took 5 seconds to accomplish what i wanted to. Make my edits and adjustments, go to grid view, right click on said image, develop settings, copy settings, check all, then same steps to the new picture you want to copy the settings over to but you paste the settings you just copied. This doesn't seem to be in the new Lightroom CC and it is very frustrating.
Make adjustments to your primary image. Open presets and make one of your own. Then apply the preset to as many other images as you want.
Bet you can do it in 5 seconds!
Just came across this thread with same issue. I finally found the solution (though not as robust as Classic):
Make edits to your first photo
With that photo thumbnail selected, in the top menu, go to "Photo>Copy Edit Settings"
Select the photo you'd like to apply edits to
Go to "Photo>Paste Edit Settings"
Why it's not included in the right click anymore, we'll never know...
It's even easier than that: You can press Ctrl+C, choose the next image and press Ctrl+V. It even says so while selecting said option.
What it can't do (and I really hope this comes soon) is copying the settings to more than one image at a time.