Of course there's a method to use stock recovery without soldering. All necessary files are included in my Google Drive folder and it's based on a DHCP / TFTP recovery method (MiWifiRepairTool).
If you don't want to use the MiWifiRepairTool you could even do the same thing manually. The guide how to do that is included in the official documentation on the OpenWRT website.
A pretty good guide for the straightforward MiWifiRepairTool is available here (of course you should use the correct stock image for your router instead of the image file mentioned in that thread)