Lenovo does not provide a direct "click-to-download" ISO link like Microsoft does. Instead, they use a secure verification process to ensure you get the exact build for your specific serial number. 1. Use the Lenovo Digital Download Recovery Service (DDRS)
Download the tool to finish the process. 2. The Lenovo USB Recovery Creator Tool lenovo oem windows 10 iso download better
Log in with your Lenovo ID and submit a request for a digital download. Lenovo does not provide a direct "click-to-download" ISO