const isLocationValid = (location) => {
    return location
        && location.city
        && location.countryOrRegion
        && typeof location.geoCoordinates?.latitude === "number"
        && typeof location.geoCoordinates?.longitude === "number"
}

const extractLocationInfo = ({city, countryOrRegion, geoCoordinates: {latitude, longitude}}) => ({
    city,
    country: countryOrRegion,
    ll:[latitude, longitude]
})

const processData = async () => {
    ...

    events.map(event => ({
        ...
        location: isLocationValid(event.location) ? extractLocationInfo(event.location) : await geoip.lookup()
    }))
}