Does messageBuilder work in Watchface or not?

[spyx1]

Hello.
I became the proud owner of a Bip 5 watch. I’m trying to create my own watchface and there was a need to load data via fetch api. Everything works in the emulator, but when I install my watchface on the watch, the data is not loaded.
I need someone to confirm that messageBuilder works not only on pages and widgets, but also on watchface.

[MyoungXUE]

Hello, the Watchface does not support MessageBuilder. Only Mini Program support MessageBuilder.