Re: "I gave up trying to use the mail app in google. When I returned to Apple Mail it would no longer delete email when I selected the trash icon. Instructions on line don't match Sequoia.
Can anyone give step by step instructions ..."
Apple Support's article: Delete emails in Mail on Mac - Apple Support
Eg: says:
"Deleted messages are available until they’re permanently erased.
Delete an email
- Go to the Mail app
on your Mac. - Select a message.
- Click
in the Mail toolbar or move the pointer over the message’s header, then click the Delete button that appears.
Tip: To prevent the next message in the list from being automatically selected (and marked as read), press and hold the Option key when you delete the message.
If you set the “Move discarded messages” option to Bin in Viewing settings in Mail, you can delete a message by swiping left on the trackpad with two fingers or by moving the pointer over a Mail notification, then clicking Delete (or the Bin icon)."
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If needed: See the above linked article for how to: "Delete multiple emails" and / or "Permanently delete emails"
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Resource: Mail User Guide for macOS Sequoia