It is possible to disable default toasts for the AvailabilitySettings and EventTypeSettings atoms to then use hooks => callbacks and listen for updates to then render your own toasts. If we use the AvailabilitySettings atom, make changes and press “Save” a confirmation appears: We can disable them using disableToasts prop: 
<AvailabilitySettings
    disableToasts={true}
/>
Now when changes happen and Save is clicked the toast will not appear. You can then create functions and pass them to hooks: 
<AvailabilitySettings
    disableToasts={true}
    onUpdateSuccess={updateSuccessHandler}
    onUpdateError={updateErrorHandler}
    onDeleteSuccess={deleteSucessHandler}
    onDeleteError={deleteErrorHandler}
/>
in case of success response is passed to your functions and in case of error and error.