How immmediate is the immediate relativ?

Question. I know someone who is in a petition of getting his mother to US. She was already approved since November 2025 and still awaiting for an interview until now. The petitioner is a US CITIZEN. Now in my case, im the beneficiary and my PD is May 2025. Now my question is, if i was already been approved already, is there any chance that I may have schedule for the interview considering that I am the wife the petitioner and we have a kid already? Or its the same as the mother of the person I know? Don’t you think 3months is kinda long in just waiting for an interview? What fo you think is the usaual span from the approval until interview schedule?