NewMicrosoft Teams · PowerPoint Live
Microsoft Teams: PowerPoint Live Light theme support
PowerPoint Live now supports light theme mode in Teams presentations. This is a new feature that gives presenters additional display options (light, dark, classic, or high contrast) to choose from based on preferences and system settings.
Microsoft's description
Presenting PowerPoint slides in Teams just got better. PowerPoint Live now supports light mode, giving presenters the option to present in light, dark, classic, or high contrast mode based on their preferences and system settings.