How Ubuntu MATE 22 04 for the Raspberry Pi is made

Good day sir! Liked the video. One question; the built-scripts used for building the pre-built PI4 images of Ubuntu 22.04-mate, are they available on github somehere? I have some very specific needs so I'd like to adapt them for my use case a little bit. I will share the experience and results

why isn't Ubuntu mate in rpi-imager program as one of the options?

Hi ..i work with Ubuntu mate 22.04 ...pi camera not working(raspistill not found) ..
Help me please

In a situation where it' shard to know which system to blame or chase down, if i'm trying to install a 3rd party HAT (geekworm X1003 -- pcie/nvme/m.2), and it's not bein recognized... and the reasons could be blamed on using the Ubuntu 23 image that the Raspberry Pi Imager can create (other OSs) instead of the official Raspbery pi os, is there any likelihood that irt can be fixed by just installing some missing apt package? Or would this be something that the ubuntu rpi iso maintainers overlooked in the device tree mess?

i'm in that scenarios where, i don't know if it' sthe pi5, or the pcie hat, or the m.2, or the os image, etc.

i enabled pcie in /etc/firmware/config.txt, made sure eeprom was at the latest .

I've asked this question at ubuntu, reddit, geekworm, raspberry pi forums... everybody likes to blame the next system.

If it can run with the official rpi5 image, i'm certain it could be made to work with the ubuntu image if i knew what was missing in the ubuntu image or it's configuration/packages. But i have no idea what 's involved.