Dear Niex!
I found the datasheet for HG8245Q2(Enterprise network universal model) for you.

Generally, the downstream rate of the ONT is much higher than the upstream rate.
But the pictogram you described is not normal. If multiple HG8245Qs are the same, the device is not faulty.
Please confirm your equipment source, whether it belongs to the operator's custom equipment because the functionality and performance of the customized version are limited.
Thank you!