Your's device is eligible for quarterly security patch level update, so you will be get it may be in this month. If you like please accept as a solution it's help to others users also, click on 3dots in my reply section and click on accept solution. Thanks.
There are main two reasons, Firstly as explain by @goodthings , Quarterly updates.. And second, currently samsung has to release 7.0 with Andriod 15 beta in Sept..so maybe bcoz of this there is a delay in Security updates..
