It's been coming since they went source-available years ago.
Wikimedia switched to Browsertime by @sitespeedio (easy choice with Peter on our team). I hope they'll add a nice UI like old WPT, combined with one-click self hosting or a sponsor for a public service. For now we use the API with a Grafana dashboard that displays videos and screenshots directly.
https://grafana.wikimedia.org/d/IvAfnmLMk/page-drilldown
https://wikitech.wikimedia.org/wiki/Performance/Synthetic_testing
Or use the old UI WPT here:
https://www.robinosborne.co.uk/2022/09/01/how-to-create-an-apache-licenced-private-webpagetest-setup-and-get-the-classic-interface/