Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
1
If you are able to install Android apps on your Chromebook, you can download the Android version of the Microsoft 365 apps from the Google Play Store on your Chromebook.
2
If those versions of the apps do not meet your needs, then you can cancel the Microsoft 365 subscription to get a pro-rata refund.
Log into your Microsoft 365 account on this link:
https://account.microsoft.com/services/
Click the Manage button beside your subscription.
From there, you can cancel the subscription, and also disable the recurring billing on the subscription.
You can check your eligibility to a refund using the steps they provide on this link.