App Store issues High Sierra MacBook Pro

For a long time now when I search for apps in the AppStore on my computer, I get super funky results. Things that don’t relate to the name of what I’ve searched at all, nothing but third party apps etc. Even when searching for apps I know exist. I have an older MacBook Pro, purchased back in early 2012. Didn’t need it to be high tech so didn’t really bother with many updates. Was perviously running Yosemite, so I updated to High Sierra thinking that might fix things. I still can’t find apps I’m looking for. When I search them on safari, I can find them in the store on Apple.com and have verified that my OS is up to date enough to support the app, yet when I click on “view in Mac App Store” in safari, I get the message “application not available in the US” I currently have this app on both and iPhone and an iPad that are all under the same Apple ID as the computer, and have Family Sharing on but still can not get the app to show up to be able to put it on my computer anywhere no matter how I try to work around the crappy search results I keep running into for some reason (the app in particular I can seem to find is Classical Conversations Memory Work Cycle 3). I have cleared caches and restarted several times. Still no luck. Any ideas of how to get this already purchased app onto this older computer would be amazing! And a fix to this issue with the AppStore would be a bonus.

1) below is the result I get when I search the AppStore app installed on the computer

2)followed by finding the app in the AppStore online

3) next is after clicking to “view in Mac App Store”

4) the app successfully installed on my iPhone downloaded from the US store