It kind of wired, and a while ago did not happen.
I have a universal Wi-Fi remote control in the Tuya App. Also, I have some scenes. The all work great in the Tuya app and in home assistant. I use Tuya Integration. To connect to Alexa, I use Nabu Casa. The scenes I want are exposed.
On the Alexa app I have create a Speech Routine to call the Scene and it works, but after a day or so the scene vanishes from Alexa. Is like it has forget it. After that I have to manually sync the entities to amazon and redo the Routine.
Huge problem for the wife approval factor.