Apple IPad Pro compatible with thé Microsoft 365 product?

You cannot install Office 365 Windows PC software on your iPad. However, there is now an Office365 App in the Apple App Store both iPad and iPhone.

• Microsoft Office

https://apps.apple.com/gb/app/microsoft-office/id541164041

The Office 365 App for iPad is a “cut-down” single install App; this App does not replicate full MS Office functionality. But this is not the end of the story. 

There are individual Microsoft Apps for Word, Excel, PowerPoint, Outlook etc. intended for iPad. iPad models with a screen size of less than 10.1” can access a restricted set of App features, including creation and editing of documents, for free. 

For iPad devices with a screen larger than 10.1”, the MS App’s require an active Microsoft 365 Subscription - which you may already have. If you don’t have an active O365 subscription, functionality is limited to opening and reviewing existing documents.

All the Microsoft Apps for iPad can be found in the Apple App Store.

Microsoft Word, Excel, PowerPoint, Outlook and others are all available from the Apple App Store. All require iOS/iPadOS13 or later.

• Word

https://apps.apple.com/gb/app/microsoft-word/id586447913

• Excel

https://apps.apple.com/gb/app/microsoft-excel/id586683407

• PowerPoint

https://apps.apple.com/gb/app/microsoft-powerpoint/id586449534

• Outlook

https://apps.apple.com/gb/app/microsoft-outlook/id951937596

• Teams

https://apps.apple.com/gb/app/microsoft-teams/id1113153706

• OneDrive

https://apps.apple.com/gb/app/microsoft-onedrive/id477537958

• Authenticator

https://apps.apple.com/gb/app/microsoft-authenticator/id983156458

• OneNote

https://apps.apple.com/gb/app/microsoft-onenote/id410395246

In summary, MS Productivity Apps for iPad (such as Word, Excel, PowerPoint) offer limited functionality without an Office 365 Subscription - but only for devices with a screen size of 10.1” or less. Devices with larger screens only permit you to view (but not create or edit) an existing document. Full App functionality requires an active Office 365 Subscription.

If you’re running iOS 12 as per the footer, likely no.

Too old.

But best get the official answer directly from the service vendor, Microsoft.

https://support.microsoft.com/en-us/office/install-and-set-up-office-on-an-iphone-or-ipad-9df6d10c-7281-4671-8666-6ca8e339b628

Apple iWork Pages, Numbers, and Keynote are also supported and can read and write many Microsoft Office documents, but getting a new install of those (if you have not previously acquired those apps) as far back as on iOS 12 also won’t be easy.

Best thing to do is check with the developer of the app; operating systems are stand-alones; the third party apps needs to be/make their product compatible with the OS, not the other way around.