10000mAh ($12.79) or 20000mAh ($22.09) portable battery pack charger, Amazon, FSSS >$35 or FS w/Prime

These seem like great prices for large battery bricks.
There’s code WYZDSU26 for the smaller 10000mAh version:
https://www.amazon.com/dp/B07JL7GCQP/
and code OY9KPOAQ for the larger 20000mAh version:
https://www.amazon.com/dp/B07G26S5V8/
Fakespot shows them with A grades, and reviews are promising.
Can anyone tell if these can charge a USB-C style phone like the Galaxy S8? It says it supports "USB-C charging protocol (not Power Delivery)."
I’m thinking of buying the bigger one, because I only have small 4mAh chargers at home.