Our measured data suggests that El Niño is only really a small variation in the rising trend of temperatures. In this diagram, you can see El Niño years as early spikes, of what would become the La Niña plateau a few years later:
2023, as determined by the same organisation and with the same reference temperature, is at +1.2°C. Source
As such, it does somewhat jump beyond the trend so far, but so did 2016, and the hopes that 2016 was just a temporary high, that's now definitely been crushed by 2023.
That's why it would make sense, if it's actually already accelerating. That would explain why we're repeatedly seeing new highs by ever bigger margins...