Trying to Get a Copy of Mojave

Hello,

I'm trying to get a copy of Mojave when I have already upgraded to Catalina. I have gone to the App link on How to upgrade to macOS Mojave, but every time I do iTunes says, "Item Not Available The item you've requested is not currently in the U.S. store." I can see it on the App store on my phone, but there's no way to download it and transfer it. Is there any other way to get it?

I also get the same issue if I try to get High Sierra, although the page for Sierra has just a regular download link.