Atera allows in "Patch Search & Deploy" to filter by a KB and generate the corresponding reort.

Once the report was generated it is possible to select multiple devices where the KB has not been installed and install that patch by clicking on the button "Install".

But it is not possible to do the opposite. I cannot select devices where the patch has been installed and then remove it.

I understand the concept behind it:
In the summary you see "All patches" by default. So it would be confusing to select devices that have and have not the patch installed and then select "Install" or "Uninstall".

But it would work, if the "Uninstall" option were to appear after selecting in the Summary "Installed" radio button.

This feature is essential as it enables installed KBs that caused a problem and could not be excluded on time could be uninstalled on multiple devices in a timely manner.