@kugiigi thankyou for your kind help. I think I've figured out why after reading so much, I found out that not all Android devices support charging and OTG at the same time, some mentioned the value of resistor on certain pins.
https://forum.xda-developers.com/t/android-tab-which-supports-otg-and-charging-at-the-same-time.3896766/
Anyway, thank you again for your help Kugiigi

@kugiigi thankyou for your kind help. I think I've figured out why after reading so much, I found out that not all Android devices support charging and OTG at the same time, some mentioned the value of resistor on certain pins.
https://forum.xda-developers.com/t/android-tab-which-supports-otg-and-charging-at-the-same-time.3896766/
Anyway, thank you again for your help Kugiigi

@kugiigi thanks a bunch Btw, what other devices that you can confirm can do that? I may just try and find second hand phones.

@kugiigi
I tried a few different steps:

1. I plug the power & external drive to the hub, then plug in the hub to phone (only power works)
2. Only plug ext drive to hub, hub to phone. At this point the ext drive works, but later I plug in the power to the hub, it doesn't charge and just continue reading the ext drive.
3. Only plug the power to hub, hub to phone. The charging works fine. But after I plug in ext drive, it just ignores the drive, and continue charging only.
   Basically whatever it does first will stay and ignore the rest. I tried with LAN cable too since the anker hub also has the socket for Ethernet port. It behaves the same as the ext drive.

I suspect that the hub was broken, but nope, it works on my macbook and Samsung Galaxy phone.

Hi, I just successfully flashed my old OnePlus 5 with Ubuntu 20.04 using UBPorts installer.

But I can't make my phone to be charged while reading a USB drive. I tried using Anker powered hub, but the phone can either charge or read external drive, but cannot do both at the same time.

How should I enable this ACA (Accesory Charging Adaptor) mode? Thank you.