how do i bring a scene into another project?

I have many projects

I ahev a scene in project a " that I want to bring into project “b”

how d o I do this

ive tried but everytime I open it it reopens its original project

ive tried all I know and cant figure this out

would I have to export the scene? or?

Go to the original Assets folder where you have the scene

Copy it and go to your new Project’s Assets folder and paste it