Excel is spreadsheet application. It is not related to the parent post, which discusses networked CRUD application, with various integration points, DB, caching, redundant deployments, etc..
Integration points: Everyone sends their version to Person A, and they integrate it, filter it, postprocess it, extracts parts into another sheet, etc.
Caching: Everyone has their own version of the excel sheet in their local inbox.
Redundant: There's typically plenty of shared directories on which you can find the same excel sheet in different versions.
No, Excel is not relevant to the conversation. Excel is a standalone desktop application. No, Excel is not an example of a "no-code" webapp. Do you seriously need another adult to tell you these things?