Thank you for contacting WPML Support. Could you please try to follow the below steps:
1. Go to the WPML >> Settings page.
2. Enable the Advanced Translation Editor as you can see in the attached screenshot.
3. Visit the WPML >> Translation Management page again and see if now it shows the Translation Tools tab.
It seems the Language Mapping column is missing from your screenshot. This usually happens when the Advanced Translation Editor is not enabled from the WPML >> Settings page. Could you please try to enable Advanced Translation Editor and see if this resolves the issue?