Happy Holidays to you as well!
We have not tested the Arduino Uno R4 WiFi with the Zumo shield, but I suspect most of the library will work okay, with the exception of the buzzer code, which is what it looks like most of your errors are from.
Since most of the library’s core functions will probably work okay, you might try installing the library manually (i.e. not with the library manager) then deleting the code in the parts of the library that are causing problems. For example, you could delete all of the code in PololuBuzzer.cpp, which should stop those errors from occurring.
By the way, you might consider the Zumo 2040 Robot, which is a newer version of the Zumo based on the Raspberry Pi RP2040 microcontroller (like the one on the Raspberry Pi Pico). It does not have built-in WiFi, but along with the built-in microcontroller it has many additional features that the Zumo Shield version does not, such as motor encoders, proximity sensors, an OLED display, 3 user pushbuttons, and 6 RGB LEDs.
Brandon