USB4, like Thunderbolt, boasts 40Gbps bandwidth, although note that there is also a 20Gbps version ... Mac USB-C chargers. Check the Power Delivery (PD) charging power each hub or adapter offers ...

If you’re going to be regularly charging more than one device at a time, buy an adapter with at least two ports—some have as many as four ports. You can even get a mix of USB-C and USB-A ...