This table below is from a chumash from the parsha Acharei.
It is shown that a union with a sister is punished by lashes, if it was intentional plus witnessed plus a warning. I think the punishment should be burning too.
It also says that a union with a non-Jewish woman, if it was intentional without witnesses is excision. I don't think that it is excision but rather something else. I say this because she is not a 100% ervah like ur mom or aunt or sis etc.
Can someone comfirm that the table is indeed correct?

https://www.chabad.org/parshah/article_cdo/aid/2192387/jewish/Kehot-Chumash.htm
– Mars Sojourner May 08 '23 at 13:06