Hello BelCcc,
Thank you for using Apple Support Communities. When using the Home app, you must first confirm if your accessory is compatible with the Home app: Home app - Accessories - Apple
If it is, you can add your accessory not only by scanning a code but by holding your device near the accessory: Add a smart home accessory to the Home app - Apple Support
Add other accessories to the Home app
1. Power on your accessory* and make sure that it's nearby.
2. Open the Home app on your iPhone or iPad and tap Add
.
3. Tap Add Accessory.
4. Follow the instructions to scan a code or hold your device near the accessory to add it. If you’re adding a Matter accessory that was previously paired to another app, tap More options, then select your accessory.
5. When your accessory appears, tap it. If asked to Add Accessory to Network, tap Allow.
6. Assign your accessory to a room and name it to help you identify and control it.
7. Tap Continue, then tap Done.
If you wish to use Siri with Shortcuts for your accessory, that accessory must also support Siri Shortcuts before you can ask Siri for help. If your accessory supports it, you can use Siri by following these steps:
1.) Edit the shortcut.
2.) Tap Add
or the Add to Siri button
next to a shortcut that you want to add.
3.) Tap Add to Siri.
We hope this information is helpful. Thank you for using Apple Support Communities.