We need fancy watch faces like lemfo lem16 and lokmat appllp6. And is the any new model of full android watch ? Or the watch like bakeey z18 which could include song storage?

Round Custom Faces Face Requests
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I need also amoled

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So, these faces are animated by using a third party Android app without permission from the app developer.

It’s possible to make faces like this but you need to know how to code using the api of the app that was used without permission.
Not easy…

No amoled screens for Android watches at the moment due to the small size and the large cost.

No, the Bakeey Z18 does not support custom watch faces like the Android watch does.
Very different OS and just not possible.