Hello Sydnj01,
Thank you for keeping us updated. You did mention that everyone else can see you without any issues This issue only occurs with one specific contact. This might be linked to that specific contact's device. If this is the case, we can recommend some steps they should try on their device to further isolate this issue. Follow the steps below:
1.) Make sure both devices are fully updated to the most compatible iOS version. This can usually help with unique issues, since updates include fixes. Just in case, this link can guide you through the update process: Update your iPhone or iPad - Apple Support
2.) Check to see if your friend has any restrictions enabled: Use parental controls on your child's iPhone, iPad, and iPod touch - Apple Support
3.) You can also try refreshing both device's communication settings by resetting your Network Settings. Tap Settings > General > Transfer or Reset [device] > Reset > Reset Network Settings. This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you’ve used before. If you're using iCloud Keychain, these settings are also removed from other signed-in devices.
We hope these steps help you. Thank you for using Apple Support Communities.