Hello deathmetalbaby666,
You mentioned that the accessory was deleted; just to confirm, did you add the accessory back to the Home app? This link will guide you through how to ensure the accessory was added correctly, and may help: Add an accessory to the Home app
Before you add an accessory
• Update your iPhone or iPad to the latest version of iOS or iPadOS.
• Make sure that your accessory is powered on and nearby.
• Check the accessory's manual to see if it needs additional hardware to work with HomeKit or Matter.

Add accessories with your iPhone or iPad
To add an accessory to the Home app, use your iPhone or iPad. You can't add accessories to the Home app on Mac.
1. Open the Home app and tap Add
.
2. Tap Add Accessory
.
3. Use the camera on your iPhone or iPad to scan the eight-digit HomeKit code, or QR code on the accessory or accessory documentation. If you have an iPhone 7 or later and see
on your accessory, hold your iPhone near the accessory to add it.
4. When your accessory appears, tap it. If asked to Add Accessory to Network, tap Allow.
5. Assign your accessory to a room and name it to help you identify it in the Home app and control it with Siri.
6. Tap Continue, then tap Done.
If you need additional assistance, please contact Apple Support for assistance. You might be able to reach them here: Contact Apple Support
Thanks!