Recovery Rebate Credit for 2021

I am helping my friend file his tax return for 2021.  He is married filing jointly with 2 children both under 17.  One is 8 and one is 5.   They all have social security numbers.  They all are green card holders.  They have been in the states since September 2021.  Turbo Tax is giving him $5600 Recovery Rebate Credit ( $1400 x 4 = $5600 )  The third stimulus check was given out last spring and they were not even in the country.   Are they entitled to this credit?