Go to https://wikimedia.biterg.io/goto/a0d44c821146e4d72ebcd2467797f8d9 (Git activity for [[ https://gerrit.wikimedia.org/r/#/q/project:mediawiki/extensions/Gather | Gather extension ]])
It properly resembles https://phabricator.wikimedia.org/diffusion/EGAT/history/master/ and

Go to https://wikimedia.biterg.io/goto/05da56fb282508d21469306c6e134dc5 (Git activity for [[ https://gerrit.wikimedia.org/r/#/q/project:mediawiki/extensions/Echo | Echo extension ]])
Shows nothing.
Though https://phabricator.wikimedia.org/diffusion/ECHO/history/master/ shows activity lately.

I'm wondering if I miss something obvious. "Echo" is not included in the "Repositories" widget at the bottom as that's limited to the top 50 entries but I'd expect activity to be displayed if I explicitly query for it.