Hi,
Kayece here, An Independent advisor and a user just like you. I will be happy to assist you today.
If your Minecraft Realm appears paid and active on Microsoft, but not in the game, please get in touch with Minecraft Support directly using the link below:
https://help.minecraft.net/hc/en-us/request/new
Please choose "Realms Support" as the category for your inquiry.
You may see the references below that indicate that you need to contact Minecraft support regarding this issue.
https://answers.microsoft.com/en-us/xbox/forum/...
https://answers.microsoft.com/en-us/xbox/forum/...
I hope this helps. If you need more assistance, please let me know.
Stay Safe!