If you’re not seeing Microsoft Store on the taskbar, it might have been unpinned.To search for it: In the search box on the taskbar, type Microsoft Store.If you see it in the results, select it. To make sure you can find it easily later, press and hold (or right-click) the Microsoft Store tile and select Pin to Start or More > Pin to taskbar .

https://support.microsoft.com/en-us/account-billing/trouble-finding-microsoft-store-in-windows-10-1d94d942-bc55-e762-6cda-ca5bbb383285