Good catch ! 
I confused two different posts of you both regarding the coming 25.10 release.
That would be this post:
"Questing Snapshot 4 released"
and this post:
"Call for testing: first set of 25.10 RCs ready!" ... including "Ubuntu MATE"! :-)
Which I obviously merged in my mind.
To make things clear. I tested the Release Candidate and NOT the snapshot 4
I followed this link:
https://iso.qa.ubuntu.com/qatracker/milestones/475/builds/341983/downloads
Which gave me this ISO:
http://cdimage.ubuntu.com/ubuntu-mate/daily-live/20251005/questing-desktop-amd64.iso
Origin: Ubuntu
Label: Ubuntu
Suite: questing
Version: 25.10
Codename: questing
Date: Sun, 05 Oct 2025 22:40:37 UTC
Architectures: amd64 i386
Components: main restricted universe multiverse
Description: Ubuntu Questing 25.10
I will re-edit and correct my post to minimize further confusion
Thanks for the update 