I'd note Airbus is seeing the same pattern. The 737-MAX's A320neo competitor, for example:
https://en.wikipedia.org/wiki/List_of_Airbus_A320neo_family_...
1,689 orders in 2023, 154 in 2024.
https://en.wikipedia.org/wiki/List_of_Airbus_A220_orders_and...
141 orders in 2023, negative 12 in 2024.
As a result, I presume the explanation is less "no Boeing" and more something like "orders have a reporting lag" or "2023 was a big year for airlines post-COVID".