USB hubs.

Plain old splitters will almost certainly damage the port, and if this is with a machine where USB-C is part of the motherboard, it could cause even more damage and be really expensive to repair.

The power-only ones are not too pricey. But if you also need high speed data transfer (like drives) those cost a bit more. Be careful that even the ones that claim data exchange may not support drive speeds. It took me three tries to finally find one that worked.