All eligible phones would get the update once it's out of Beta ready to be released and would be sent out in batches dependent on phone model, serial / Build number and region.
I updated go the September Security update on the 28th of September on my Fold 3 that was purchased direct from Samsung UK.
I expect to see the October Securith update soon as I see people in other regions are now receiving the new update.
I appreciate that I'm using a different phone to you.
Current Phone > Samsung Z Fold³ 5G.