After reading and verifying the KB listed below. The requirement indicates that "Box Enterprise to paid Google Workspace: For Box enterprises, you must have a Google Workspace enterprise account to connect to the Box for Google Workspace integration. This includes any paid Google editor SKU, including EDU and ORG licenses".
I found that our environment is part of Google Workspace enterprise. But our account is specifically called "Google Workspace for Education Fundamentals". It is a free version since we are an (.)edu.
I like to verify that is this "Box for Google Workspace" app will work with our "Google Workspace for Education Fundamentals".
When I asked Google Support the same question and they confirmed that they think it should work, because the language used in the KB indicates and I quote "...description on the KB for Box they are referring to any Google Workspace edition that is paid or the free approved editions"
Not sure if you can confirm?
Ref:
https://support.box.com/hc/en-us/articles/360043697034-Deploying-Box-for-Google-Workspace-in-your-Enterprise