There are two manuals here: https://downloads.rollei.com/download...
Since the year is 2022, the manual is valid "from 2021" and it shows exactly what you described. So I don't see the problem.
I think that all tripod screw sizes are in the same range, so there shouldn't be any problems. Personally I use the Panasonic Lumix G5 with no worries with this tripod, it's a plate that you screw into the camera which makes attaching to the tripod very practical, it's not necessary to screw for a long time into the camera every time you want to use the tripod. But to be 100% sure you should look at the data sheets of both products in relation to the size of the thread and the screw.
According to the manufacturer, the head is attached with a 3/8 inch screw. Ergo, Yes it can use a Manfrotto head (with 3/8 inch thread). https://www.rollei.de/rollei-c6i...