Mixer tap Alsvik IKEA kitchen - Adjust water pressure

Unfortunately, that didn’t work after all. Even though there is a channel in the cartridge lever, it doesn't seem like a screw is hidden there; in any case, I can't get a grip on it. I don't see any other possibilities to hide a screw on the visible part of the cartridge. The screws suggested in the installation manual on the lever do not exist. I have completely removed the cartridge, but there doesn't seem to be any way to adjust anything anywhere.

Does anyone else have suggestions?

Did you manage it now? Maybe go to the information desk with the [Mischbatterie]?