Flipkart — No option to download invoice for my order

I had purchased an earbuds on October 2021, and I have face a issue with it. The product is under warranty and can be availed for a replacement from the manufacturers. The return policies of the manufactures requires the digital bill invoice of the product sent through email from Flipkart and does not take hard invoice. But I have received only the hard invoice with the product and having checked several times, no soft invoice has been sent to my Gmail. I also don't have the option to download invoice of the product from my order page from Flipkart.

Please look into this problem.