Yes, income from a US employer is counted as foreign source income if you are living and working overseas.
The source of your earned income is the place where you perform the services for which you received the income. Foreign earned income is income you receive for performing personal services in a foreign country. Where or how you are paid has no effect on the source of the income. For example, income you receive for work done in France is income from a foreign source even if the income is paid directly to your bank account in the United States and your employer is located in New York City.
https://www.irs.gov/individuals/international-taxpayers/foreign-earned-income-exclusion-what-is-fore...
If you receive a specific amount for work done in the United States, you must report that amount as U.S. source income. If you cannot determine how much is for work done in the United States, or for work done partly in the United States and partly in a foreign country, determine the amount of U.S. source income using the method that most correctly shows the proper source of your income. In most cases you can make this determination on a time basis. U.S. source income is the amount that results from multiplying your total pay (including allowances, reimbursements other than for foreign moves, and noncash fringe benefits) by a fraction. The numerator (top number) is the number of days you worked within the United States. The denominator (bottom number) is the total number of days of work for which you were paid.
