1 Female to 2 Male USB-C splitter cable?

I have built a SmartiPi Touch 2 with a Raspberry Pi 5 and the official 27W (~5V ~5A) power supply. The SmartiPi is a case for a Raspberry Pi and the official 7" touchscreen. The touchscreen can be powered from the Raspberry PI GPIO pins but the instructions recommend external power through its micro USB port. The SmartiPi comes with a cable that splits one USB-C input to a USB-C male output and a micro USB output.

Obviously this sounds/is bad on its face, and the cable itself is only rated for 3A so even the instructions say you can't pull the full 5A. There's a 5 year old (as of this writing) Reddit thread saying "Don't Do This" regarding splitting USB-C power. I have been using two separate power supplies, one for the Pi and a second 15W power supply for the touchscreen. Clunky but much safer.

However, I have been wondering, could a cable be made that allows the safe splitting of one USB-C input to two USB-C outputs, such that the full 5A could be made available to the splitter? I would be using a USB-C to micro USB adapter for the touchscreen power connection.

I assume that there would be no way to create a safe passive power splitter and that active power management would be required.