Large exchanges add dozens of coins per month. So it's not that hard, is it? If there is a desire, there is always the opportunity to hire more programmers and other employees.
On the new exchange there are enough options for 2 coins, these are ETH and BTC. 90% of options trades will be held only with them.
I agree with you. Trading will be primarily options for ETH and BTC. But this does not mean that you do not need to add to the exchange other coins for the range.