Hi! I understand you're having trouble seeing messages from your girlfriend on the Friends app while she can see them from her side. To help you better, could you please clarify a couple of things?

1. Are you talking about regular text messages or messages within the Friends app itself?
2. Have you noticed if this issue happens with any other contacts or just with your girlfriend?
3. Have you tried restarting your iPhone or closing and reopening the Friends app already?

Meanwhile, here are some initial steps we can try focused on your iPhone and the Friends app:

1. Restart the App: Completely close the Friends app by swiping it away from the app switcher, then reopen it to refresh the messaging thread.
2. Check Network Connection: Ensure your iPhone has a stable internet connection through Wi-Fi or cellular data, as poor connectivity can cause message sync issues.
3. Update the App: Go to the App Store and check if there’s an update available for the Friends app, as updates often fix bugs.
4. Log Out and Back In: Sometimes logging out of your Friends app account and signing back in can reset your message sync.
5. Check for Blocked Contacts: On your iPhone, go to Settings > Messages > Blocked Contacts and make sure your girlfriend isn’t accidentally blocked.
6. iOS Message Settings: Since you're on iOS 18.7, go to Settings > Messages and check that both "Send as SMS" and "MMS Messaging" are enabled to ensure full message compatibility.

If these steps don’t resolve it, there might be a glitch specifically in the Friends app chat thread between you two. This kind of issue has been reported, and sometimes the app’s cache or data can get stuck1.

Could you try these and let me know what you observe? If necessary, I can guide you through some advanced troubleshooting or alternate ways to recover the chat messages visibility.

Are you satisfied with the solution I provided so far?