I see that the Ubuntu Daily Build is out. How long does it take the Ubuntu MATE Daily Build to be posted? I have gotten in the habit of looking for and reporting bugs, issues with features etc.
This is the link it will be at (currently still Plucky Puffin)
I'd give it a day, to be more accurate (narrow down to hours) you'd have to look at the cron job that triggers the ISO builds (I can't recall the link otherwise I'd have included it), but I do see the QA ISO tracker being populated - https://iso.qa.ubuntu.com/qatracker/milestones/468/builds , and even note one QA test has been performed already.
Addendum: Maybe I was a little optimistic, there was a build failure for Ubuntu-MATE.
https://ubuntu-archive-team.ubuntu.com/cd-build-logs/ubuntu-mate/questing/daily-live-20250502.log