How to make emails from blocked senders go to deleted instead of junk

Are you using New Outlook for Windows desktop, Classic Outlook, or Outlook on the web?

You can create a rule to send those emails straight to Deleted.

Go to Settings > Mail > Rules, create a new rule, set the condition to match the sender’s email address, and choose the action as Delete or Move to Deleted Items. Set up rules in Outlook: https://support.microsoft.com/office/set-up-rules-in-outlook-75ab719a-2ce8-49a7-a214-6d62b67cbd41