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
Minisopuru USB C Hub – USB C Hub... https://www.amazon.com/dp/B0BP81NSNZ?ref=ppx_pop_mob_ap_share. I don’t use the PD port but I wanted a basic all USBC hub.