Based on the documentation, the address suggestions only work on Account, Work Order and Booking. Please make this available as a standard control that can be added onto any custom form or custom tables. Ideally, this would work for any table that has address fields.

Currently working around this with a custom control leveraging Bing Autosuggest API.

Enable Address Suggestions:

Address recommendations on account, work order, and booking forms let you quickly enter addresses. Recommendations help ensure accuracy and reduce errors. You can enable address recommendations in the settings. Address recommendations are for use on account, work order, and booking forms. It's not available for customization or use on other forms and is hidden during form editing.