Yeah imagine if they had unique product names for "AI in OneDrive", "AI in SharePoint", "AI in Outlook"... That would be even more ridiculous.
To me, the issue isn't that they've named so many things 'Copilot' but rather that Copilot is in every goddamn product.
Microsoft has been replacing most of their brands by Copilot. There's no searching for it in a product, the product is named "Copilot".