I think the issue i was having was that my microsoft store account and my xbox account were mismatched. Once i made them the same account the issue was fixed and the realm showed up in my feed when I relaunched the game.
I purchased a realm through the Xbox website and it won't show up in Minecraft
I was trying to purchase a Minecraft realm through Minecraft Windows 10 edition, but was completely unable to. I went to the Xbox website and signed into my account and was able to purchase the realm there. Unfortunately the realm I purchased does NOT show up in the realms menu and I am completely unable to access it through Minecraft. My card was charged and the subscriptions panel on the Microsoft website shows the realm there.
Realms menu pictured below (I edited out the names of my previous realms)
Windows for home | Windows 10 | Gaming
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