Any updates on the union's legal challenge?

So I know that PSAC has legally challenged the government's decision to mandate 3 days in office, but it's been a while since I heard any updates. Has there been any new developments in 2025? I know they started a campaign with ads on the radio and all over Reddit with the slogan "Remote Works", but I was under the impression that it had more to do with the fact that bargaining is coming up.

In terms of the legal challenge itself is anyone in the know?