.docx and .xlsx Files Open as .zip on Mobile — How to Fix?

[zikrikn]

I tried to create a flow to resend Excel and Word files (forwarding). The issue is that when I use the API with a GET request to fetch the files via URL, they are returned in the formats application/vnd.openxmlformats-officedocument.spreadsheetml.sheet and application/vnd.openxmlformats-officedocument.wordprocessingml.document. I then change the file names and extensions to .xlsx and .docx, and resend them through the API. However, the problem is that the file format appears differently when opened on a desktop versus on a phone—it turns into a .zip file. How can I ensure the format stays consistent across all platforms?

• In desktop version
  

• In mobile version