Number of Strike Prices in a Secuirty

How are the number of strikes allowed for trading in a security decided ? Recently IBULHSGFIN crossed the 200 Strike Price on Friday and I don’t see any contract above 200 on the option chain on NSE website right now Option Chain, but in Kite I do see some trades that have happened in 210 Strike price June Expiry, the LTT says it happened in January, how is that possible ? Are there quarterly option contracts traded somewhere not available to retail investor ? Screenshot_2020-06-20%20IBULHSGFIN%20JUN%20210%20CE%20(NFO-OPT)%20-%20Kite%20Chart(1)
Also going forward from Monday , will the strike prices above 200 start showing on NSE website ?
@siva @mohitmehra If you can please answer these queries

Nothing like that, you can see OI column, it shows there is none. It moved 30% on friday alone hence strike is not showing on NSE.

Yes, it should.