lightning-record-edit-form: display text field as a custom picklist?

I’ve created a custom object where the user manually enters a locale value (ex: en_US, es). Instead of letting the user manually enter a locale, I’d like to provide the user with a combo box of valid options to select from. (The options would be a subset of the supported languages selected in the org, retrieved via Apex.) In Visualforce, there was a way to accomplish this by overriding the default page layout and supplying your own custom VF page, which would include a <apex:selectList> for a given text field, and the select options retrieved via Apex.

Is it possible to do the same thing with <lightning-record-edit-form>, where an <lightning-input-field> can be defined as picklist values supplied via a wired lookup? Or can a include a <lightning-combobox>? I was hoping there would be an easy way to accomplish what I need in LWC without having to recreate the entire record layout from scratch.