How can I make a draw.io document in Google Drive publicly editable without a Google account?

[reece]

Goal

I'd like to collaborate on a draw.io document with people who do not use Google accounts (and are prohibited by their institution from doing so for work). The document is in Google Drive and publicly accessible, shared with public Editor permissions. With my personal Google account and incognito, I can see and download the file (i.e., the file is accessible), but I have not figured out how to make the file editable with the draw.io interface.

It appears that draw.io requires Google authentication when editing a Google Drive file, even if it is publicly editable. This deviates from the behavior of other (Google) apps, such as docs; for example, if a Google doc is shared publicly editable, the same link works in incognito without login (see demonstration below). I seek the same behavior but with draw.io. Is this possible?

Demonstration

I created a sample file to demonstrate. The file is owned by my work account. The file is shared like this:

"Copy link" provides this link:
https://drive.google.com/file/d/1E7vKZeTlcy0REmaqFk8sGUA9CaEcSdYU/view?usp=drive_link

In my personal or incognito browser, that link shows:

In my work browser (i.e., the file owner), the same link shows:

Notice the "Open with draw.io" button is shown only when accessed from my work account.

Clicking the "Open with draw.io" redirects to
https://app.diagrams.net/#G1E7vKZeTlcy0REmaqFk8sGUA9CaEcSdYU

However, when I try to use the same link outside my work Google organization, I see

Interpretation

It appears that draw.io requires Google authentication even when editing a file that is purportedly publicly editable. This deviates from the behavior of other (Google) apps, such as docs: If a Google doc is shared publicly editable, the link works in incognito without login (see below). I seek the same behavior but with draw.io.

For comparison, here is a document opened in three windows: the left panel shows sharing, the middle panel shows editing in my work account, and the right shows editing (with the same url) in an incognito window.