Malaysia has 1 and only 5G provider. It's call DNB. However, per DNB, there are no Asus phones listed as supported on their 5G network 🤦
As per DNB, it's up to the respective phones' manufacturers to contact them and obtain the relevant parameters to be included into the respective phones' firmware.
So Asus, what have you done? Can't get Volte and Vowifi working properly and now no 5G??? Maybe it's time you exit the Malaysia market like Sony, HTC etc 😑