This plan covers Kazakhstan, Kyrgyzstan, Uzbekistan and Tajikistan on a single eSIM. You install it once before you leave and it keeps working as you cross each border, with no new QR code and no hunting for a shop in a town where nobody speaks your language.
That combination is the awkward one. Most regional plans that mention Central Asia quietly leave Tajikistan out, which is exactly the country where you least want to be offline. If your route is Almaty to Bishkek to Tashkent and then down into the Pamirs, check the country list on any plan you are considering before you buy, including ours.
The four countries here are the four most people actually travel between. If your trip also takes in Turkmenistan or Azerbaijan, this plan will not cover those and you are better off buying per country.