Environment variable in PBI Deployment Pipeline

Hi,

We have created a Power BI deployment pipeline and assigned appropriate dev, test, and production workspaces to dev, test, and production. Connected dev workspace with on premises dev source and gateway connections. Created deployment rules to deploy dataflow and semantic models in the test workspace through the deployment pipeline. Could you please help me by answering the below questions.

1. Can we create deployment rules based on the workspace instead of each dataflow and semantic model? (Like environment variables)

2. If the gateway is different from dev to test. How to setup it up in test and is there any default way to set it up instead of manual setup?

Thanks,

SP