Zircon is being adapted to UKSK patern VLS, this means that current UKSK platforms would be capable of using it with minor modifications.
I have listed those platforms above, in the OP.
Oscar-IIs are probably all going to be refitted to Oscar-III standard. The reason is simple - there are delays in Yasen program and Oscar-III bring new quality through quantity (72 VLS cells is no joke). Current narrative is that after Yasens we would begin construction of a new SSN class - Husky. One of the possible Husky laouts: