Yes, I do hope so. But and as first step I would order only 20V PDC003 cable with E-marker plus adapter to 4.0×1.7mm. This should solve (80% chance) all of your expectations from using Anker 737 (if not insisting to use directly USB-C port for charging Librem 14), especially by rethinking about on how @carlosgonz charges his Librem laptop:
Therefore (although somewhat late reaction of mine):
Quite same item is here as well, but/or buying 1.2m 20V PDC003 cable with E-marker + physical adapter to 4.0×1.7mm would be up to your final choice. In short, there is definitively no need for another power bank, I’m quite sure. Links provided here are just as idea-wise provided.
Your feedback I’d appreciate when time comes and please keep using DC barrel there even with your powerful power bank.
EDIT: @mariapost, please make sure that any cable from certain power supply (USB-C male to USB-C male, etc.) is certified to transmit
5A. I even made thread about USB4® certified cables, yet standard USB2.0 Type C cable that supports transfer of
5A current would be equally very reliable one (avoid using with the Librem 14 those USB Type C cables of up to
20V/3A). Nowadays having E-Mark chip is fine feature as well, especially if only few USB Type C cables needed (and please avoid buying USB3.1/USB3.2 cables if not really familiar with their quality background).
Here recommended approach confirmed today (only DC output voltage differs, you’ll be using adapter or cable requesting 20V PD input) as well: