Hello SacDev1368,
It sounds like you are not able to share your Activity with your girlfriend. We understand how important this is to you and we are here to help.
You were reviewing a very helpful article. At this point, let's ensure both of your devices meet the following requirements found within the same resource:
- "An iPhone or iPod touch with iOS 15 or later.
- An iCloud account with Health turned on and two-factor authentication enabled.
- The person you want to start sharing with must be saved in your Contacts."
Let's also ensure she has followed each of the steps found in the resource.
If so, is she able to send you an invite? Are you able to send an invite to anybody else? Also, which iPhones are you and your girlfriend using?
Cheers!