Apple Watch complication configuration validation

[skycryer]

Is your feature request related to a problem? Please describe.
When creating a complication we need a validation or an info what data is allowed. Because when wrong data is added it looks like the complication is not working but the watch does not show it when config is wrong.

Describe the solution you'd like
When selection a complication add info or placeholder with needed data like text (value), number (100) or data (0.5) and info about max length maybe. Maybe add a preview image of the complication the while be rendered. The images can be extracted from apple support page

https://developer.apple.com/design/human-interface-guidelines/watchos/overview/complications/

Then we know what the complication will look like. That will help to add the data in correct format.