Hi
In my view,you should first check the network connection of Microsoft Store,if you can normally open the other apps in Microsoft Store,that means the network might work properly.
Second,open the powershell in administrator,run tracert dl.delivery.mp.microsoft.com ,this setp will make sure the route work properly.
Third,try to change dns setting "8.8.8.8 or 8.8.4.4"or"1.1.1.1 or 1.0.0.1"
Fourth,open the system setting select Windows update,find the advanced option,open Transmission Optimization,find advcanced option,close the function"download to other computers",pulling the background bandwidth maximum.
If you do all the steps and the problems are not be solved,run windows troubleshotting.