If you encountered following error and want to remove the eSIM itself from your device, here are the steps to follow:
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To erase your eSIM:
1. Go to Settings.
2. Tap either Cellular (for US english) or Mobile Service (for UK english).
3. Tap the plan (eSIM) you want to erase.
4. Tap Delete eSIM.

Ref: https://support.apple.com/en-my/102421