I could could probably hard code it in with a PHP Code action but keeping the field & link editable through the customizer would be preferred. Any advice and direction would be much appreciated. Thanks!
Before switching to FSE I always created my customizer fields in a one area (for me it was in my master.html page) and I never used the created version of it as an output. I always created a duplicate of the customizer field and use the “Don’t create the control, just display it” anytime I wanted to output it.
In your case, you can do the same. Create the control on a page that does not get exported to your theme (just to have its functionality) and then when you go to use your custom version of it, check the box I mentioned above and grab the PHP it will output (by using the </> icon top right of action). Then paste that PHP into a PHP function WP action and modify it with your antispambot() function around the output of the email address.