There's a failing system test in Anonymous tracking which will be fixed when merging (to avoid merging PR in submodules etc).
There are couple of failing UI tests but I believe some of them fail in 3.x-dev as well.
I've been trying to reproduce and fix this failing screenshot https://builds-artifacts.matomo.org/matomo-org/matomo/tagmanager/29950/UIIntegrationTest_admin_manage_tracking_code.png but cannot reproduce it locally when running the UI tests and neither in the browser. Also not seeing any JS error in the UI build test logs.
FYI: I'm currently waiting for a review of the wording on that page.
Updated wording and added translations.
screenshots need to be updated, otherwise lgtm (tested locally and it works)