One of my important desktop flow vanished after an update. so I thought of a way to recover it, did dozens of searches but got no luck. after a little bit of digging, I found a very easy way to recover the deleted desktop flow. Here is how I did it.
All of your previous flows are saved in a temp file i.e: \AppData\Local\Microsoft\Power Automate Desktop\Designer\Temp
There will be a bunch of random folders, each folder contains one of your previously created desktop flow in it. there were 350+ in my case. There's a file within that folder "script.robin" It has all the steps of the flow in plain text.

Getting Exact File
Rather than going through each folder 350+ times, I automated it. Created a simple flow that loops through each folder getting the file contents of script.robin. You have to remember anything unique labels, folder names, file names, or anything that you used in the flow. Then just simply crop the text and use "If flagFound = True" you found your deleted flow.

Import To PAD
Create a new flow and Simply copy everything below "@SENSITIVE: []" and paste it to PAD.
Thats all you have recovered the deleted Desktop Flow From Power Automate Desktop.