You can. You’ll need a 100W PD charger and an e-marker cable, and you’ll need to find a way to make the charger output lower voltage
I used a 7~24V input PD 100W output buck converter. The output voltage is the highest PD level below the input and the output current is 5A max. I connected it to a bench power supply and lowered the voltage and I could get 15V 4.5A, 12V 4.5A and 9V 4.5A. 4.5A because 5*0.9. Note the PD protocol shown on the USB meter, 15/12/9/5V 5A. I can use chargestate param to edit the 4.5A to 5A without problem. The only problem is 5V, likely due to the limitation of internal buck boost the actual amperage is lower despite requesting 5A from the PD charger.