When Huawei showcased the P40 series, I was a little grumpy that not even the P40 + worstening had received 120Hz, but the whole series had to settle for 90Hz screens. This may be something that Huawei, however, will "fix" later this year.
It has recently emerged that Huawei may equip the upcoming Mate 40 series with 120Hz refresh rate. It will be very exciting to see if that will be the case and it would not surprise me if that will be the case as the Mate series often has the snap better specifications than the P series.
You can read more about the news here.