Do you have a requirement to show Account object related list on opportunity page layout in Lightning? In very first glance, You might jump to
Category: Lightning App Builder

Populating a field on-load of Record Edit Form in Lightning Web Component
Use Case:- We are using lightning-record-edit-form to create Contact record associated to an Account. We need to populate the account id in Contact form placed

Showing a Related List based on User Profile in Lightning Experience
Business Use Case: The business want to show and hide the Opportunity related list on Account record page based on User Profile in Lightning Experience.

Point and Click alternative to Lightning Data Service
You might be loving Lightning Data Service and its capabilities. It Creates an editable form or display form for a record. This component requires API