To make it works, you need:
1- Install the Message apk on the watch.
This version works for me ( https://t.me/c/1375192546/42021 ), it seems that newer versions have bugs.
2- Install Wear OS app from the store.
DO NOT REMOVE the chinese version, you should have both on your phone. You will have to grant permissions (Contact, message...) for this one also.
3- Enjoy the Message apps. You can send text, read alls that are on your phone...