Hi U81Ridged2,
You started from a good article: Share your location with your family
As mentioned in the article you started from you can: "Get notifications about a family member's location
If you want to know when a friend or family member has arrived at or left a location, or if they aren't at a particular place during a specific time window, you can set up recurring notifications."
You can check more details on both devices with the steps below from this article: Find people and share your location with Find My
"Get notified when a friend arrives at, leaves, or isn't at a location
- Open the Find My app and select the People tab.
- Select the person that you want to share notifications with.
- Scroll down and under Notifications, tap Add.
- Tap Notify Me to get notified of a friend's location change.* Tap Notify Friend to notify a friend of your location change.
- Under When, select Arrives, Leaves, or Is Not At. If you're sharing your location change, select I Arrive or I Leave.
- Under Location, tap to select your current location, or tap New Location to select a different location.
7. Under Frequency, select Only Once or Every Time.
* Your friend will be notified when you set a location-based notification. For recurring location-based notifications, your friend has to accept the invitation."
If needed there are also steps for stopping the notifications. See the section "Stop sharing your location" in the same article shared above. Should there be a different issue, provide more information or detail about what's occurring and we'll take it from there.
Cheers.