Hi @cc dd
From this blog, you can refer to this paragraph European Economic Area PCs:
As noted above, some functionality is only available in the EEA. Windows uses the region chosen by the customer during device setup to identify if the PC is in the EEA. Once chosen in device setup, the region used for DMA compliance can only be changed by resetting the PC.
As you mentioned that your PC is American build, if it doesn't choose EEA region when setup, Windows won't identify it's an EEA PC. That's why you can't uninstall Edge and Bing web search. If you want to make your PC in DMA EEA compliance, the only way is reinstalling it: Give your PC a Fresh Start.
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Regards,
Yu Zhou