Widgets from iPhone are displayed with the wrong light theme on my Mac desktop

After upgrading my iPhone 12 Pro Max to iOS 26 and my Mac to macOS Tahoe 26 the iPhone widgets that are placed on my macOS desktop are displayed in the bright/light theme, even though both my Mac and iPhone are set to dark mode and the same widgets are displayed with the correct (dark) theme on my iPhone. So it's only when my iPhone sends over these widgets to my Mac desktop that the incorrect theme is transferred. This occurs for third party apps from various developers, so it's not limited to a single developer. The problem is that I can't install these apps directly on my Mac since they are iPhone apps and not downloadable on the Mac App Store, even if you click the iPhone/iPad tab in search results. How do I fix this bug?