Awaiting someone with more advanced knowledge at this field, have a look at the
OBS Log Analyzer. The log file you provided contains an Auto-Config Wizard run, so it is not reliable. Please restart OBS and stream and/or record for at least 30 seconds. Then provide that log.
Try to avoid streaming via Wi-Fi. It can feel very stable to your friend at normal usage, but having a constant 30fps FullHD stream is a
very high load. Only the slightest instabilities and hickups can cause serious lagging.
The C922 Pro Stream Webcam's built in microphone has a lower sample rate than the rest. Is it possible to set it to 48 kHz too?