To allow quick editing of a record's status and entering a due date from the record's feed in the Salesforce Mobile App:
* A. Custom action. This option enables users to perform specific tasks directly from the record page in the Salesforce Mobile App, such as editing fields.
Steps to create a custom action:
* Navigate to Setup # Object Manager # select the relevant object.
* Click Buttons, Links, and Actions # New Action.
* Set Action Type to 'Update a Record'.
* Configure the action layout to include the Status and Custom Due Date fields.
* Add the action to the Salesforce Mobile layout.
This setup provides an efficient way for users to update key fields without navigating away from the record feed.
For detailed setup instructions, see Salesforce's documentation on Creating Quick Actions.

The most likely reason why users are unable to view the custom Lightning component on mobile devices is that the component has been developed for Desktop Pages only. Some components are not supported on mobile devices or have different behavior on mobile devices. An app builder should check the component documentation or metadata to see if it is compatible with mobile devices.

Lightning Object Creator is a tool that allows app builders to create an object with fields and import data from a spreadsheet simultaneously. Import Wizard and Data Loader are tools for importing data into existing objects, not creating new objects. Schema Builder is a tool for creating and modifying objects and fields, but not importing data.

Partial Copy is the type of testing environment that the app builder should create to use a sandbox template for Accounts, Projects, and Project Milestones. According to the Salesforce documentation, "Partial Copy sandboxes copy your production org's configuration (metadata) and some of your production org's data as defined by a sandbox template." Developer, Developer Pro, and Scratch Org are not types of testing environments that support sandbox templates.

The app builder would enable this ability in Chatter Settings. Chatter Settings is a setup menu that allows an app builder to configure various aspects of Chatter functionality, such as feeds, groups, email notifications, and more. One of the options in Chatter Settings is Enable Approvals via Chatter, which allows users to approve or reject requests from their team via Chatter posts or comments. Option A, B, and D are not places where an app builder would enable this ability.