Makita doesn’t make an official USB-C PD (power delivery) adaptor (they only have ADP05 with two 5V/2A ports) so I found this UDCB094 on AliExpress (affiliate link) with PD65W output and with variants for 18V Makita, DeWalt, Milwaukee and Bosch power tool batteries. It appears to very well built — using 16AWG wires for the DC connection and implements true PD65W standard via the CSU3AF10 charge controller.
Teardown and Internal Photos
The PCB is labeled “YR-PD65W”.