Currently, third-party widgets for Apple Watch running watchOS 10 are limited. While the update allows for the addition of widgets, most available options are from native Apple apps. As of now, users can add widgets from a selection of built-in applications such as Weather, Calendar, Music, and more, totaling around 24 options[1].
However, some third-party apps have begun to introduce widgets. For example, Carrot Weather, Parcel, and Flighty are noted to have widget support. Users have expressed interest in more third-party developers creating widgets for their apps, but the competition for the limited slots (three widget slots) poses a challenge[2][3].
As watchOS 10 evolves, it is expected that more third-party applications will offer widgets, enhancing customization and functionality for users.
Citations:[1] https://beebom.com/how-add-widgets-apple-watch/
[2] https://www.reddit.com/r/AppleWatch/comments/16r2k8e/thirdparty_widgets/
[3] https://forums.macrumors.com/threads/apple-explains-why-third-party-watch-faces-still-arent-supported-on-watchos-10.2393533/
[4] https://www.youtube.com/watch?v=LazuZG1W8m0
[5] https://forums.developer.apple.com/forums/thread/736589
[6] https://www.youtube.com/watch?v=a8dhsbjZwO0
[7] https://www.reddit.com/r/AppleWatch/comments/172mir2/rearrange_widgets/
[8] https://support.apple.com/guide/watch-ultra/use-the-smart-stack-to-show-timely-widgets-apdecf142fb9/watchos