iPad OS version of Excel question

I have a specific use question. I get excel files that I need to view and cannot view many of the fields on the iPad version of Excel. They are drop down fields mostly and the iPad version just says not supported on this version. I have to view on the Mac version.
Does anyone know of a viewer that could view these Excel files? I only need to view, not manipulate.
Thank you for any suggestions.

Sorry I don’t know anything that would view Excel files on an iPad outside of Office/Excel. I can view drop downs on cells though, so it seems odd it won’t do that. Are they old Excel formats maybe?

Will they open in Numbers?

I’m sure it’s an older version of Excel that is being used to send me these.