Content of a component copy to other component within the project area

 We are using Keywords or Test Cases for a library option but if I write a keyword test script or a Test Case in a component of RQM (e.g., component “A”) then I cannot use the same Keyword or Test Case in component “B”.

Is there a possibility to copy this or another way to multiply the Keywords or Test Cases?

Can I create a new component which based on current stream?

e.g. component "A" = stream 1.A -> create a new stream 2.A -> make this stream 2.A to a component "B"

or do I think too complicated