A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
Dear Kane Wyatt,
Thank you for providing the detailed information regarding the Excel for iPad issue.
As an initial troubleshooting step, please follow the recommendations provided by AI Assist, including updating the Excel app and iPadOS to the latest available version, and resetting the iPad, then check whether the issue persists.
If the issue continues, since the same symptoms are occurring across approximately 22 devices with different iPad models, iPadOS versions, network connections, and storage locations, I sincerely recommend you try to create a support ticket from: Microsoft 365 Admin Center>Support>Help & Support. You can raise support ticket from: https://admin.microsoft.com/Adminportal/Home?#/support/requests
The support team over there has higher permission than us to investigate the issue from background, they have more resource and correct escalation channel in handling this kind of issues. This would be a more efficient way in handling the case for you.
For reference: Get support | Microsoft Docs
Thanks for your patience and understanding so far. Hope you having a nice day and really much warm regards to you as well!