Please note: the original post mentioned the EOS R6 Mark II, that was obviously nonsense…
Courtesy of DC Watch, here are images of lenses and adapters made by some less known manufacturer.
Above: Zhong Yi Optics Speedmaster 50mm F/0.95 III, will be released for the Canon EOS R and Nikon Z systems.
A Speedmaster 50mm F/0.95 C will also be released. Guess the “C” stay for Cinema.
Various adapters from K&L Concept, EOS R and Nikon Z inclusive.
Commlite adapters, here too for EOS R.
Manual Focusing Kipon ELEGANT lenses mounted on Canon EOS R and Nikon Z.
KamLan is a Taiwanese lens manufacturer making lenses mainly for APS-C and 4/3. In the image above you see the 50mm F/1.1 Mark I (left) and 50mm F/1.1 Mark II (right).
KamLan 8mm F/3 fisheye lens
The Lomography Lomogon 32 mm F/2.5 Art lens (Canon EF and Nikon F mounts, in the image above mounted on Sony via adapter).
Chinese lens manufacturer Kapkur displayed a manual focus 85mm F/1.4 lens for Canon EF mount.
And a fisheye lens too, the Kapkur 6.5mm F/3.5.
More images at DC Watch