There are two scenarios.
One is that the website administrator does not upload or update software. The other is that user rights are restricted.
Huawei does not provide the firmware for a single access network user. Only provides the OLT and ONT firmware for carriers and enterprises.
The ONT is used together with the OLT at the central site. The version must match the model. If the version is incorrect, it cannot work.
Sorry, I hope you understand.