In 2021, the US government issued a third round of Economic Impact Payments (aka stimulus checks). Most Americans get $1,400 per person (and $1,400 for each dependent, too).
You can still claim this payment if you never received it—but only if you file a 2021 tax return.
To qualify, you need to have an adjusted gross income (AGI) of less than $75,000. You should know that expats can claim a tax break called the Foreign Earned Income Exclusion (FEIE) on up to $108,700 of earned income in 2021 that reduces their AGI to zero.
Refunds are only honored up to three years after the original due date of that return. The 2021 tax return was due on June 15th, 2022 for US expats. Therefore, the final cutoff date that your 2021 return should be postmarked was June 15th, 2025.