Microsoft 365 app access to iCloud data

Does the MS 365 app have access to my iCloud files?

I need to use the MS 365 iOS app and have downloaded it.

But, in the list of files and folders, I see my iCloud files which I don’t want to share with the 365 account.

I want to keep the data separated and I am using different accounts for iCloud and for 365.

I hope someone could help ensuring that my iCloud data are not shared with the 365 account.