well easiest way to test would be requesting one, but I don't have account key that in whitelist. iirc default is x1-x2-e1-leaf but what about alternative chains?

you can do that by adding the X1 cross signed to the chain. https://crt.sh/?id=3958242236

What kind of alternative chains LE give for E1 certificates?

hebbet October 7, 2021, 9:21am 2

as stated here there is no alternative chains.

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