Please see the article below for our reference:
Unlike Facebook and Twitter, Instagram lacks a desktop experience. The photo-sharing network limits users on how much they can post, see, and engage with if they’re logged in through a computer.
In a way, it makes sense that Instagram doesn’t want you uploading professionally edited photos from your computer. The app was designed to have you share instant photos and video clips of your everyday life.
If you login to Instagram on a browser, you’ll be able to scroll through your feed and like all of your friends’ photos. You can also access your notifications and the explore tab. But there’s no option for you to upload photos or watch Instagram stories. Until now.
Because everything has its loopholes, there are multiple ways you can still use Instagram on your Windows PC or Mac as if you were using it on your smartphone.
Reference:
https://lifehacker.com/use-instagram-on-any-computer-like-you-would-on-a-smart-1797184613