I have a similar issue: I find it quite odd how (by 2022 - Version Pro 2.9.1) there still isn't an obvious way to essentially emulate an existing FC's table/attribute setup, in another (already created FC). 
I understand that you can apply when setting up a new FC, but I have al the FCs I want to apply the schema to already created. 
I used a Model Builder work around, but that was basically to re-create all the FCs just with a slightly different name. A nuisance and effort, so I would like to see this functionality (which I would have thought would be a fairly regularly required task) to be available.  
A simple method would be when in the Data Design> Fields view, an 'import from existing FC' tool. 
