To have access to the full list of metrics available for Google Analytics, you can check it in the Custom Reports

​RAW (taken directly from Google Analytics)

Adds to Cart (GA4)

Conversions (GA4)

Ecommerce Purchases (GA4)

Engaged Sessions (GA4)

New Sessions (UA)

Purchase Revenue (GA4)

Repeat Sessions (UA)

Screen Pageviews (GA4)

Sessions

Transaction Revenue

Transactions

User Engagement Duration - mins (GA4)

User Engagement Duration - secs (GA4)

Users (Non-Unique)

COMPUTED (calculated from raw metrics based on Google Analytics definitions)

Average Purchase Revenue (GA4)

Bounce Rate (GA4)

Conversion Rate

GA Paid Conversion Value

Page Views per Session (GA4)

Purchase Conversion Rate (GA4)