It is often a good sign when SSA sends you to their doctor quickly, especially since they scheduled you an SSA doctor appointment less than 2 months after applying for SSI.
Most often it can take 3 to 6 months or even more to get scheduled with an SSA doctor, but some health conditions can fast track your SSI application and get you approved sooner and often on the first try.
It all also depends on your conditions.
However even if you do get a quick SSA doctors appointment it does not guarantee an SSI approval, but it is a good sign in most cases.
I've known people who got a quick SSA doctors appointment and got approved for SSI within a month or 2 after seeing the SSA doctor.
As long as you have your own medical records from your doctor and are seeing your doctor and attending your doctors appointments every time and have strong medical evidence can often get approved on the first try.
But even if you get denied on the first try for SSI, you can still appeal and could be approved during the appeal process.
If you get denied at the appeal process you can get a disability lawyer who is only paid once you win from your backpay and if you lose then you don't pay the disability lawyer.
But never give up even if denied, you can keep fighting for the SSI and should get it if you do have medical issues that cause you a disability and prevent you from working.