Are you literally just wanting to see the location of family members?

If you’re a self-hoster there are options, and that’s pretty much the only way you can know it’s private.

Two that come to mind are:

The PhoneTrack NextCloud app. If you run Nextcloud you can install this in nextcloud, then install a location logger on the phones. I’m more familiar with Android which has options but from a search I think OwnTracks can send to Nextcloud and supports iOS and Android (someone reported their iOS success here).

Home Assistant let’s you see locations of people on a map that is tracked with the Home Assistant mobile app on Android/iOS.

I have found uLogger or the old PhoneTrack app (that connect to GPS on a schedule) to be more accurate than apps that rely on Google telling them when the location has changed (Home Assistant and I think Owntracks). But also much more of a battery drain.

So it depends how often you want the location to be updated. I find running uLogger or PhoneTrack on the phone actually makes Home Assistant get location updates much quicker(I run both for different reasons).