From what I’m seeing the recommended oil for the US version of the 4-cylinder 1.7 SOHC engine is 5W-20, API: GF-4, Honda P/N 08798-9023.
Whether it would be to your advantage or detriment to switch oil specs now, hard to say. If your car develops a problem with the variable valve timing actuator – probably the most oil-spec sensitive part – that will be a clue the 20w50 SM was the wrong choice. But switching back to the recommended oil spec now may cause problems too.