Tell us what you are trying to do?
When type in the relationship field full value then I want to show it in the dropdown and then select. I don't want to show value in the dropdown when typing. Is it possible to make that? See images.
Is there any documentation that you are following?
No
Is there a similar example that we can see?
No
What is the link to your site?
it is under construction.
Unfortunately this is not something that will be possible. This is due to how the select2 field works. It basically operates on the principle of a dynamic search so once you start typing a search is performed to find the correct match for each keystroke that you enter.