Are their numbers on the (two?) bigger chips?
If you can read them we can look up some info on whether their outputs can be paralleled. I’m hopeful but, TBH, doubtful this can be done.
I was confused by the AliExpress page for that module as one image seems to say that you can only get the 20V/5A 100W PD output by using a >87W PD input. But if you already have a 100W PD adapter to power this module’s input then why would this module be needed?
But, another image shows the barrel jack being used for the input and a USB tester showing the PD output of the module being 20V/5A. 
I’m definitely confused about what that module can do but I’m very interested in seeing what can be done.