It's some time distracting to always use the enter key to apply transform. Double clicking after transform seems more comfortable. It works with the crop tool but not with the free transform tool.
Thanks for the report. +1 for this feature, this would be helpfull.
With Krita 4.1, I did add a right-click menu with a bunch of options for the transform tool and Crop tool. For the transform tool right click menu...in addition to adding an option to apply the transformation, you can also change the type and do a few other things like flipping and rotating. I am going to close this ticket for now. If there are further changes we can open up a new item.