Apple should have made and offered this accessory from day 1 of their USB-C vision (along with a multipurpose hub as well.)
Unfortunately, what you are looking for is rare and almost nonexistent...I am not sure if it the lack of chipsets, the licensing, the lack of demand, or what, but I want one of these as well. I've seen a few from completely unnamed companies (most of which looked pretty seedy), but I have never purchased any given USB's ability to fry the host device.
One solution could be getting a hub that has a lot of USB-A ports and then purchasing male USB-A to male USB-C cables. Of course, a downside is that most of these "USB-C hubs" only support the 5 Gbps protocol through their USB-A ports, which if you are using an external SSD can be a significant bottleneck.
OWC makes a Thunderbolt 4 multiplier, which in theory should be cross-compatible with USB 4 (i.e., capable of working with USB devices), but OWC hasn't clarified this yet. Someone who is smarter than me with those technicalities might be able to clarify this.
Add three Thunderbolt 4 (USB-C) and one USB 3.2 Gen 2 Type-A port to your Mac or PC and connect more storage, displays, and accessories.
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