Can I supply 5 volts directly to the 5 volt pin on an Uno R4 WiFi board? I want to run the Arduino and a servo motor off of an external 5 volt battery pack. I notice on the bottom of the board there looks to be a small dot that says VUSB, maybe I could connect there. I could go directly into the USB C port with a connector but I still need to split off the power for the servo motor.
Have you consulted the datasheet, especially the power tree section?
No.
From the R4 documentation:
To power the UNO R4 Minima you may either use a USB-C® cable or the VIN pin.