Downloading Power Point Slide

I upload a powerpoint slide and a pdf version of same file. I share these two files via an email with a link embedded.
The email recipient is able to view the pdf file and importantly a link is provided to download the pdf file to the recipent's computer.
With the powerpoint slide, no such download link is provided. How can I make this file available to my user for downloading on his/her computer? Also I noticed that zoho docs displays pdf filename as name.pdf but for the powerpoint file name there is no extention (pptx).

pdf: https://docs.zoho.com/file/lm21525fe47289c214131b82deac6e9b67048
powerpoint: https://docs.zoho.com/file/lm21551236d1fb5424231aec1563632f96f31

Thanks for looking at this.