Sorry for my request and for having wasted time because, in the end, the TUYA integration works very well in Gladys.
This malfunction was related to 2 problems.
- I no longer had rights to the API resources
- access to Cloud Develop Base Resource and IoT Core because the Trial period had expired.
- For the zone: I had entered Western Europe instead of Central Europe
I found my lamps in « Tuya Discovery »