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 20V/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).
EDIT II:
Here recommended approach confirmed today (only DC output voltage differs, you’ll be using adapter or cable requesting 20V PD input) as well:
