Sharing a form based on an automation to external clients


We want to populate a form within Smartsheet so as contacts are entered they get notified via an automation to enter specific data. When we adjust the workflow, it tells me I need to set the smartsheet to unrestricted (greyed out) and I am unsure how to proceed? I saw a similar post in a different thread that indicated we still need to go through the sharing center, but wouldn't that share the entire form and allow all clients to view all of the data entered? I am relatively new to using Smartsheet so forgive me if this is something I should be able to easily identify?