Sonoma 14.6.1 on MacBook Pro 15 late 2013 but no Wi-Fi and only default display

The Wi-Fi settings can't find the network (which is working and did work on Big Sur on this machine) and the display can't be changed from the default, extremely small, hardly readable default 2880x1800 on "Unknown Display". I am a novice and would need very detailed troubleshooting step information.

submitted by /u/Adventurous-File1880
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