Instagram post in 1800x1440 resolution

[musk]

Hi guys,
Do you know if it exists any Instagram external site (or any chrome extension) whick allow to download IG post in 1800x1440 resolution?
Until two weeks ago "mystalk" allowed to do that, but it also switched to 1350x1080 standard resolution

 

[tony]

Do you know if mystalk somehow found a way to access 1800x1440 pictures stored by Instagram or did they simply resize the standard resolution? If they resized it, you could do that yourself, for example with Topaz Gigapixel AI (with their free trial). True high resolution would be better of course, but all ways I've found so far are also in standard resolution.