When I first searched for !shell@programming.dev in feddit.dk’s search field I saw your comment and then a second later the link to the community was shown:

    link text :"Shell Scripting@programming.dev - 1 subscriber"

    link to :https://feddit.dk/c/shell@programming.dev

    the html is: <a class="community-link " title="!shell@programming.dev" href="/c/shell@programming.dev"><pictu ....

I clicked the link to the community and subscribed to the community.

Then I read your comment so I tried to search again and (I think) only your comment was shown.

Now later again when I try your comment the links are shown consistently.

So try again :-)