Power Apps: Modern, refreshed look for the mail app

Microsoft's description

Extends the Fluent-based modern, refreshed look for model-driven apps to the mail app, providing consistent controls, spacing, colors, and visual treatment when users work in that app. This was previously enabled for the monthly channel with the 2602.1 release and is now being enabled for the semiannual channel with the 2609.3 release. Availability Field Value Impacted products All model-driven apps Release channel Semiannual Version 2609.3 build Dependencies N/A Feature activation Default on