Search Filter: Search only Custom Field instead of the title

Hello everyone, I am using a Bricks Search Filter on an overview page. By default, this only searches the title of the posts. Instead of the title, I would like a custom field of the posts to be searched. Is there an option for this?
Thank you in advance!

Can someone Help? Thanks in advance!

Can refer to this example

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username - mherhenry (everywhere(FB, IG))