Bro In your case they just forgot security patch update but in J7 Max user case they forgot 9.0 Pie major update...But don't worry bro you'll definitely receive security patch update very soon.
I have 2 J7 Max devices bro and you are right but we gonna definitely receive 9.0 pie. but need some patience. Samsung push very slow updates for this device, last year same problem with oreo os also...
