Thanks for getting in touch! You can specify multiple tenants with this Chain Deployment step by line-separating multiple tenant names in the step. I’ll attach a screenshot below showing my test setup.
Alternatively, a solution to avoid having to update this list when you want to change which tenants to deploy to would be to use the built-in Deploy a Release step template. This will automatically deploy the “child” project to the same target tenants that the “parent” project is deploying to.
I hope this helps! Don’t hesitate to reach out if I can help with anything else.