If you are a Salesforce Classic user, you can simulate the Reveal Widget in your Account records by downloading the Reveal Data App.
After downloading the Reveal for Salesforce Data App
Step 1
Go to your Salesforce Settings > Search for 'Page Layouts' to find the Account Page Layout section > On the 'Account Layout' page layout option, click Edit
Step 2
On the left side, scroll to 'Related Lists' > Select 'Partner relationships' to enable this list
Step 3
Configure the fields as follows:
