Can you delete all emails from a single name without doing one at a time?

Hi Bobnsuz01, from Inbox swipe down to reveal Search. Tap the text field and type in the vendor’s name. Tap the vendor’s name in the search results. Tap Edit. Slide your finger down the checkboxes on the left until you get to the bottom of the screen to select them all. The page will scroll as you slide your finger. Tap the Trash icon. Tap Trash Selected Messages.

The messages in Trash will be deleted automatically after the time specified in Settings. If you want to delete them immediately, go to Trash, then tap Edit. Tap Select All. Tap Delete. Tap Delete All.

iPhone 12 Pro Max, iOS 15.0.1

No. You have to select each one at a time.