You can set a property’s link-preview image without changing its gallery order or grid card photo.
- Edit the property in WordPress.
- Scroll to the Rank Math box below the editor.
- Open the Social tab.
- Set a custom Facebook image, and a Twitter image if needed.
The HomeRunner sync never writes to this field, so the image you set stays in place after future syncs. If you use Yoast, the equivalent setting is under its Social tab.