Flags in Apple mail

ChrisF1949,

It's possible the inbox isn't in column view. Check out the guide here: Use column layout in Mail on Mac

You can also view the details quoted below.

"Use column layout in Mail on Mac

When you use column layout to view email messages, the message list appears in columns across the Mail window, and the message preview appears below or to the side of the list.

1. In the Mail app  on your Mac, choose View > Use Column Layout (a checkmark indicates the layout is in use).
2. Do any of the following: 

• Change which columns are visible: Control-click a column header, then choose an attribute, such as Muted. The Conversation, Status, and Subject columns are always shown.
• Show the message preview on the side or bottom: Choose View > Show Side Preview or View > Show Bottom Preview. 
• Change how messages are sorted: Control-click a column header, choose Sort By, then choose an attribute, such as From or Size, and a sort order.
• Reorder columns: Drag a column left or right to change its location.
• Show the messages in a conversation: In the Conversation column, click the arrow ."

Let us know if that helps you to view your flagged messages.

Cheers!

Hey there ChrisF1949,

Thanks for reaching out to the Apple Support Communities. For the best information on how to flag emails, and locate flagged emails in macOS Monterey, check out the steps listed in the following resource for help: Flag emails in Mail on Mac - Apple Support

Let us know if that's able to help.

Take care!