There is news that Google getting manufacturers to make devices charged thru USB Type C Power Delivery.
If you want a powerbank, get one with a USB C power delivery 2.0/3.0, which means can deliver power at least 60W. Some manufacturers say theirs are PD but only 18W which will charge or discharge very slowly.
Edit: Current Aukey powerbank uses USB C PD (Max 45W) Input/Output with USB A QC 3.0 (Max 18w)
this power should also have one port that is QC 3.0 to charge compatible mobile phones.
Most China or unknown brands say 10k mAh battery storage but outputs slow charging rate (5V 1-2A) and worse, slow charging input, which will take ages to fully charged the battery.
You can look for cheap battery, but if they use cheap circuit to give u s**ty input / output. It is not worth buying it.
I've found some in Lazada that fits the a/m requirements.
Aukey 26800 mAh 63W USB C port PD 2.0/3.0 & USB A port QC 3.0 power bank.
For charger, find at least 72W aukey, Anker or energea (left 3 pcs) that output 60W USB C & USB A QC 3.0. 60W Choetech is another option, decent PD with QC 3.0 & 2 more USB A.
Other company that worthy to note Choetech, that provides 15W Qi wireless charging (including QC 3.0 charger).
I can't find any Chinese brands that fits this requirement. (Apart from. Anker).
If you find a power bank that fits USB C PD 2.0/3.0 & USB A QC 3.0, please post it for everyone to know. Thanks