Is it possible to install MATE 1.26 on Ubuntu MATE?

While visiting repositories on https://github.com/mate-desktop I see that many MATE components are released at version 1.26. And ArchLinux AUR says the same.

Is it possible to get this (or newer) version on my Ubuntu MATE 21.04 system?

Yes, it is possible to get latest MATE 1.26 on Ubuntu MATE 21.04 and even on 20.04 LTS running on PC (amd64) and Raspberry Pi (for both armhf and arm64).

One should add the corresponding Fresh MATE PPA to the system by using commands below:

sudo add-apt-repository ppa:ubuntu-mate-dev/fresh-mate
sudo apt update
sudo apt upgrade

and then reboot and enjoy:

Note: you can always revert to previous MATE version by running the following commands:

sudo apt-get install ppa-purge
sudo ppa-purge ppa:ubuntu-mate-dev/fresh-mate

You should do this before running release upgrade to Ubuntu MATE 21.10.

Note: if you need daily MATE build - use packages from other PPA.