There are always alternatives. For Maps, check out

.) OsmAnd (https://play.google.com/store/apps/details?id=net.osmand)

.) MAPS.ME (https://play.google.com/store/apps/details?id=com.mapswithme...)

For other alternatives to avoid getting your habits turned into money by big companies, check out https://ethical.net/

I am not aware of a live location sharing function in OsmAnd.

There's this: https://osmand.net/blog/osmand-telegram-released

But I guess at that point you can just use Telegram for location sharing.

I have actually never shared my location, so no idea what features one might want for that, but this one is open-source, so relatively trustworthy: https://f-droid.org/app/ca.cmetcalfe.locationshare

I've been using Google Maps for years and didn't even notice this feature. Wow.

If you're on an iPhone there's Find My Friends that I use often.

If you already use it, Snapchat has a location sharing feature. You can also share your location on Facebook's Messenger.