I just ran autoupdate on Monterey 12.6.1 and Microsoft informed me that my versions 16.66.1 are current. In the U.S. and using Office 2021 home and business suite on that mentioned operating system. I have no idea about 16.66.22 that you are using in a European market, and you may have to contact Microsoft about product support under Ventura.
Wondering about what you downloaded and if your Foundation provides one site-license type, and what you downloaded requires different licensure from Microsoft. In any rate, both of you should verify your licenses are current and applicable to the Microsoft software you are using. Otherwise, that might result in licensing and account activation issues.
Also, Microsoft has a support community strictly for Mac MS Office users here that may help further.