Hi LMartin98,
Thanks for contacting Apple Support Communities!
We understand that you're unable to share access to your devices via the Home app since updating.
If you're unable to invite others to share control, you can follow the steps outlined in this article to help isolate this behavior further: Share control of your home
"If you can't share control of a home
- To invite people to control your home while you're away and edit permissions for them, you need to set up a home hub. If you don't have a home hub set up, you can only invite people when you're home and connected to your home Wi-Fi network. Matter-enabled accessories require a home hub, such as Apple TV 4K or HomePod mini.
- If Home has been upgraded to the new Home architecture, you must set up a home hub to share control of your home.
- You and the people you invite need the latest version of iOS, iPadOS, or macOS.
- Make sure that you and the people you invite are signed in to iCloud on iPhone, iPad, or Mac. In iCloud settings, turn on Home.
- Make sure that you and the people you invite haven't blocked each other's phone number or Apple ID. Learn how to manage blocked phone numbers, contacts, and emails on iPhone or iPad and how to manage blocked callers on Mac."
If you're still unable to share control of Home after completing these steps, we'd suggest that you contact Apple to investigate this further. You can find their contact information here: Contact Apple Support
Take care!