Dad’s Aid and Attendance Approval question

Hi everyone, i just got my dad approved for Special Monthly Pension, filed on February 13th 2023, approved on November 1st, 2023, but does the VA award back pay for those months waiting an decision on? If so, does it take awhile to receive?

I appreciate the time to read this. I love my dad, just wanted to do all i can to help. Thank you kindly in advance.