Question about Icy Box IB-DK2106-C

It depends on which Legion 7. If the power supply is 100 watts or less, then it works.
If it's a gaming notebook, you won't get 300 watts charged via the USB-C port.
Here is the homepage:
https://icybox.de/product.ph...

Yes, if your laptop has a USB-C interface and requires a maximum of 100W power.