My Mac is giving me a question mark

There’s nothing to boot from. Which usually means a storage corruption, or a storage failure.

Here is what Apple recommends doing: If your Mac starts up to a question mark - Apple Support

If you don’t have a backup of your contents, I’d encourage getting that at your earliest convenience. If you can.

Hi,

Resetting NVRAM could solve the issue.

Reset NVRAM or PRAM on your Mac - Apple Support