This thread is resolved. Here is a description of the problem and solution.
Problem: Different domain per language WPML's option doesn't work.
Solution: Check that your domains are pointing to the correct environment. For this disable WPML, now you should display the same content in both domains? (Without any redirection).
Relevant Documentation: https://wpml.org/faq/server-setting-for-languages-in-different-domains/
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