Are you talking about wlr-randr?
Because its --transform argument only accepts normal|90|180|270|flipped|flipped-90|flipped-180|flipped-270, not any transformation matrix. Maybe its just a limitation of the command line tool and it could be modified, I don't know, I haven't been too deep in the code or the protocol specifications. It also looks like it only works with wlroots based compositor.
Just because they're the good guys doesn't mean they never do propaganda. They probably under-report military damage, as this might inform the enemy of their weaknesses. On the other hand, they talk a lot about civilian casualties, as this allows them to attract the world's sympathy.
I wish smartwatches were included too so that I could travel with just one charger and one cable. I guess waterproofing a USB-C port is not that easy though (for the ratings those watches usually have).
When you do things right, people won't be sure you've done anything at all.