My dad's security screening started from Dec 15, 2023, close to your case. Still waiting.I'm on background check SS A34 from Nov 28, 2023. My MP did found out that they are checking my military, even if I didn't serve in regular army I did chose civilian sector. I did mention all of that and give them documents but look like that they want to check that. My AOR was April 4, 2023. So soon will be 2 years how I'm waiting for this. I'm conceding taking a lawyer for mandamus or taking them to court but that is extra $$$.
If you have any updates, please let us know.