Higher wattage PD chargers and powerbanks that I have here all work with voltages of 9/12/15 at 3A and 20V at up to 5A
The PD specs require a 25W device to operate at 9V 2.8A. A 25W charger is still allowed to offer 5V 5A and a 25W device is still allowed to prefer it when offered, but it is not allowed to require it.
To make it even worse: at no wattage are chargers required to offer 5V 5A. Even a 100W one (which is required to offer 20V 5A) does not need to offer it, and it is 100% PD compliant if it only offers [5V 3A, 9V 3A, 15V 3A, 20V 5A].
A quick Google search suggests they aren't hard to find:
https://www.walmart.com/ip/Type-C-Such-Phones-Charger-Charge...
> Output voltage (four charging modes): PDO DC5.0V-3.0A or 9.0V-2.77A PPS 3.3-5.9V-3A or 3.3-11.0V-2.24A
5V output at 5A is pretty unusual.