Alpha Launch
Send this to the first group of testers when an early build is ready. Set expectations about what works, what may change, and how people should report feedback. Update the access link, supported use cases, and contact details, then keep the audience limited to users who are prepared for an unfinished product.
Gate access with audience data
Store early-access eligibility as a contact property and build the audience from that property. Link to the exact entry point, name any known limitations, and give testers one feedback destination. When the release becomes generally available, move to the Feature Announcement template. The launch examples show other release shapes.