We've received lots of queries about the official Raspberry Pi 5 case and missing screws.
The Official Raspberry Pi 5 case does not come with screws because they are not required to use the case in normal desktop scenarios. Your Raspberry 5 will slot into place and rest in the case, held in place by the features around the board.
Why does the case have screw holes then? The holes are there to add your own standoffs and spacers, which allow you to stack other cases/HATs. It's not something many customers are doing, but Raspberry Pi thought this might be a useful feature.