Hi, I am Van. I'm an Independent Advisor and a Microsoft user like you. I'll be glad to help you today.
As far as I'm aware of there is no option to directly share your apps to your family on your MS account settings. The one that I do is login my MS account into the MS store on my child's account or profile on her device. then download and install the app. after the app has been installed on her machine. I logout my account from the store and sign back in her account to the store so she cannot use my account if she wants to purchase any app.
I have found this article which likely the same as the one that I did. Might as well read this out to have a better picture of the scenario
https://docs.microsoft.com/en-us/archive/blogs/...
If you are using the same PC. If you install the app in the PC using your account. The app should also be available to any user using the same PC
I hope you find this useful. Do not hesitate to get back to us if you need further assistance. I will be more than happy to help
Best regards,
Van