I cannot find the category group id number anywhere in the control panel since I upgraded to EE5. I am building a search based on cat group but I have no idea what the values are and cannot find them. Can some enlighten me to where they are listed
When you are in the EE Control Panel go to
Developer/Categories page and select a Category Group in LH pane: the category group ID is then shown as the final element of the URL - if you are viewing category group 1, your URL will look a bit like this:
It would be helpful if the group ID number appeared in a more visible place; maybe that will happen in some future version of EE, but for now that should get you home.