Enhance CMB2 Select2 Field Functionality

I'm looking for a skilled developer to enhance the appearance and behavior of CMB2 Select2 fields on my website. Currently, when users enter a search term on desktop or mobile, a secondary input field appears. I want to streamline this process so that users can type directly into the main field, with a dropdown of suggestions appearing below. This should mimic the functionality seen on https://www.my-hammer.de.

Key Requirements:
- Modify input behavior to allow direct typing in the main field with a dropdown suggestion list.
- Ensure the selection is confirmed by clicking on an item in the dropdown.
- Apply these changes to single-select dropdown fields.
- Update CMB2 to support these changes.

Functional Enhancements:
- Add custom validations to the input fields.
- Integrate the fields with another plugin for extended functionality.
- Enable AJAX loading for suggestions to improve performance and user experience.

Ideal Skills and Experience:
- Proficiency in JavaScript and jQuery, particularly with CMB2 and Select2 libraries.
- Experience in customizing WordPress plugins and themes.
- Strong understanding of AJAX for dynamic content loading.
- Ability to implement custom validations and integrate third-party plugins.

I am eager to see these improvements implemented to enhance user interaction on my website.