Hi Jeremy @Soucy, thank you for your time and effort to research a solution. I appreciate it very much!
I saw the setting, but have since confirmed to my satisfaction that ESF does not support mutual TLS (mTLS). This is unfortunate as our requirements require this, and failure to support mTLS has resulted in us moving closer to a 'build your own' solution which requires more effort, components, complexity and failure opportunities.
I am honestly surprised at this, and expected mTLS to be supported by ESF.
Thank you again, and have a great day!
Steve