PANIC kernel error reports after multiple unexpected close and restart - following hardware replacements in <1 year old MacAir

Also, post several of the Kernel Panic reports here so we can examine them (the EtreCheck report only provides a summary which doesn't always get all of the relevant details). Kernel Panic logs are found in "/Library/Logs/DiagnosticReports" folder....if none are there, then check the "Retired" subfolder. The Kernel Panics logs usually have file names containing "kernel" and/or "panic". Post several of them here using the "Additional Text" icon which looks like a piece of paper on the forum editing toolbar.

Make sure to disconnect all external devices in case one of them is causing the problem.

Exactly what components has Apple replaced on your MBAir?

-Linzini wrote:

Trying to work out how to post error reports without exceeding character limits

When posting a message it is the Icon that looks like a sheet of paper and called Additional Text. You can copy/paste text using that option to avoid the character limit.

Your tagline shows Mac OS 15.5, but if you had a clean install with OS, you should be at 15.7.2. Is that what you are seeing now?

I don't think we could really offer any suggestions until you know what Apple tells you when you go back. If still unresolved at that time, then we could further investigate by posting the free EtreCheck report using the Additional Text option when posting. That would help in case of a software incompatibility and provides a little more detail about the Panic reports, but would not resolve a hardware issue if that is the case. Apple has more intensive diagnostics they can do on your Mac in the store than what we can do here.

How to use the Add Text Feature When Post… - Apple Community