I recently deployed a google workspace add on. (its a private add on.) From the screenshot we can see uninstall is displayed, which means the add on is installed on my browser right now. After installing the add on, the icon is not displayed in the right hand side, side panel. installed plugin
You will have to specify in the add-on manifest which Workspace application is your add-on extending.
A detailed example of an add-on manifest file can be found here.
Therefore, since you want to adjust your add-on specifically such that it is a Calendar add-on, you will have to add the calendar
field in your manifest file.
After adding the field, the manifest will end up looking something similar to this:
{
"timeZone":"Asia/Kolkata",
"dependencies":{
},
"exceptionLogging":"STACKDRIVER",
"runtimeVersion":"V8",
"addOns":{
"calendar":{
"homepageTrigger":{
"runFunction":"NAME_OF_THE_FUNCTION_TO_RUN"
}
...
}
}
}