Once configuring a stack following here, you can move the stack configuration from the project where the stack was created to a different project.
Once a stack has been configured for one project, an authorized user can easily move the stack configuration to a different project and then update the configuration (such as cluster parameters and target environment settings). The new stack can then be deployed to staging or production environments.
See the benefits of moving stack here.
You can initiate moving the stack from a few different places:
On the Home page, the "Move stack" context menu of the stack you want to move
On the Stacks page, the "Move stack" context menu of the stack you want to move
To move a stack to a different Project:
Select the stack to be moved
Select "Move Stack" context menu
Select the Destination project where you want to move the stack to
Optionally change stack name
Be aware that the user must have permission for Move stack action and be a member of the target project.