Hi, I am Van. I'm an Independent Advisor and a Microsoft user like you. I'll be glad to help you today.
Microsoft Store is one of the default apps from Windows 10. Please refer to the link below on how to re-install MS store on your windows 10 pc.
https://answers.microsoft.com/en-us/windows/for...
I hope this helps solve your inquiry. Do not hesitate to get back to us if you need further assistance. I am more than happy to help
Best regards,
Van