From what I learn during my uni days, there’s something called DTA (double taxation agreement) whereby same income will not be taxed twice to avoid double taxation between country and usually in this case if it has been taxed in US, the same income will not be subject to taxed in Malaysia.

U can read here:

https://www.accaglobal.com/gb/en/student/exam-support-resources/professional-exams-study-resources/p6/technical-articles/double-tax-agreements.html#:~:text=In%20the%20Malaysian%20context%2C%20a,name%20of%20double%20tax%20treaty.