Looks like there is an official TG channel for this site. As said in docs:
This channel link is optional. We will not accept issues based on the absence or presence of a channel link with one exception:
If the channel property is set, the channel it is pointing to must be the official channel. To be considered official, the channel must be named as such somewhere on the source website (doesn't have to be on the same page as the original article).
I think it is optional to set telegram channel.Checklist said that if you set telegram channel this channel must be official
Type of issue
IV page is missing essential content
Reported
Feb 20, 2019
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As said in docs:
This channel link is optional. We will not accept issues based on the absence or presence of a channel link with one exception:
If the channel property is set, the channel it is pointing to must be the official channel. To be considered official, the channel must be named as such somewhere on the source website (doesn't have to be on the same page as the original article).
channel property should be set for this domain.