Instead of you exporting the flow from the web portal, you can copy the chunk of texts and actions on the flow, and paste them on a notepad.
You can then save them as stacks! You can retrieve them later, or send it to someone else, who can then copy them from the notepad and paste them into Microsoft Power Automate Desktop to use the flow.
If you’d like to learn more about sharing your desktop flows, have a look at this article, which shares 3 ways you can share your desktop flows.