You can also pass the trace data directly to the Wireshark pipe, without saving it to a file.
For example:
nrfutil trace lte --input-serialport <serial_port> --output-wireshark <path/to/wireshark>
This command opens Wireshark and lets you inspect the data in real time.
Note
When selecting a serial port for the trace, pick the serial port with the highest COM value.