This adapter does what you want and more: https://www.amazon.com/Multi-Port-Delivery-Splitter-Adapter-MacBook/dp/B0BLJFZ42M/

Normally, a USB-C hub with PD passthrough would reserve 15W for its own ports when connected to a USB-C PD charger, even if the host is disconnected or shut down, see https://imgur.com/a/VWweOip

I'm surprised that yours don't, do you have a link for it?

Anyway, have a look at https://www.amazon.com/s?k=usb+c+hub+pd

If you just need USB A or C ports, you can consider ACASIS, Minisopuru, PULWTOP

A cheap USB-C hub with PD passthrough like this one: https://www.amazon.com/Multi-Port-Delivery-Splitter-Adapter-MacBook/dp/B0BLJFZ42M/

Or a lighter, but more expensive USB-C splitter: https://www.amazon.com/AD-ADTRIP-Headphone-Converter-U11-White/dp/B07XB4K4XC/