I didnt receive my 2021 tax income return

I thought i finished my list to do for receiving my income tax. And i waited for so long time
but still i didnt get my tax income
i thought because they are late i'm in korea and i put korea address
when i called your service center you guys told me some information
but i couldnt find where is the information
can i get that federal tax return now? There is a way?
or it is too late?
Please tell me
thank you
p.s. the thing is i got the california tax return to my korea address on mail. However somehow i couldn't get my federal tax return yet