I have a original apple battery… but it’s still showing unknown part iPhone XR

It's possible that there is a problem with the battery itself, or with the way that it is being recognized by your iPhone. Here are a few things you can try to resolve this issue:

1. Restart your iPhone: This can sometimes help resolve any temporary issues that may be causing the battery to be recognized as an "unknown part."
2. Check for any damage to the battery or the battery connector: Make sure that the battery is properly seated in the battery compartment, and that there are no visible signs of damage to the battery or the connector.
3. Try resetting your iPhone: You can try resetting your iPhone by going to Settings > General > Reset > Reset All Settings. This will not delete any of your data, but it will reset all of your settings to their default values.
4. Check for any updates: Make sure that your iPhone is running the latest version of iOS. You can check for updates by going to Settings > General > Software Update.

If you continue to have issues with your battery being recognized as an "unknown part," you may want to consider contacting Apple support for further assistance.