Administration User Edit - Extend form

Hello Community,

I am quite new to a project that uses Shopware 6 cloud. We already have an app which gives us the possibility to make changes in the storefront.

Now we have received a request to extend the user edit form. Basically we just want to add a boolean field. Based on the documentation and other resources, I unfortunately find rather mixed information on how to implement something like this.

I hope you can either point me in the right direction or help me directly if you have already implemented something like this.

Many thanks!