Hello malmski,
Thanks for reaching out to the Apple Support Communities! From your message I understand that you need to remove some accessories from your Home app and are unable to do so.
It sounds like you've followed the steps listed under, "Delete your home or remove accessories," from this article: Set up and use the Home app.
If the device used to connect to the Home app through a Bridge, check and see if you have an option for Bridge when you are in the settings for that accessory. I know when I needed to remove a bulb from my Home app, these are the steps I had to take. Some accessories are also set up through the manufacturers app first. Be sure to check there also.
If you're not seeing any of the above listed options, try working through the following steps:
1 - Quit the Home app with these steps: How to force an app to close on your iPhone, iPad, or iPod touch.
2 - Restart your iPhone.
3 - Be sure you have turned on the Bluetooth and you're connected to the Wi-Fi of your home network.
4 - Try removing the device again.
All the best!.