@Steve Phillips, Thanks for posting in Q&A.
From your description, I know you encountered an issue that keyboard layout is incorrect during Autopilot.
Based on my researching, it might be a problem which existing Windows setup instead of autopilot, the layout mess maybe vary in different countries.
Here are some methods you can try.
1.Reset the device, configure another Autopilot Deployment profile and Set Language (Region) to User select, then you can configure language and keyboard during OOBE stage manually.
2.You can change your device language and keyboard after Autopilot follow the link below.
https://support.microsoft.com/en-us/windows/manage-the-input-and-display-language-settings-in-windows-12a10cb4-8626-9b77-0ccb-5013e0c7c7a2
3.We suggest you open an online case to get more help.
https://zcusa.951200.xyz/en-us/mem/get-support
Thanks for your kind understanding.
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