Here is someone from Spain who has the same problem after buying a fan for a small room. This was the only one that fit well without obstructing the shelf.
As this is a OEM-tuya PaaS whitelabel app, is a tuya with different certificates.
But looks there is a workaround to get it working, but looks complex:
I suppose after getting local keys you could use a HA addon like localtuya.
Good luck (and if you were able to make it working write a manual and youtube video please!)
Tried the MITM approach. I get the requests and responses from their cloud service. It seems that this is not possible to setup with local tuya, to my untrained eye. Haven’t found anything similar to the localkey for tuya devices… I can send those requests and responses if anyone is interested.