Yes, a copy of your site with the All-in-One Migration plugin is also a good option. You can upload it to a service like Google Drive or Dropbox and share the link with me. For this, I'll enable private messages for the following reply.
I checked the copy of your site on my local server, but unfortunately, I was unable to resolve the issue with the button text in the header. By the way, I can see that in another section you solved this issue. Please see the attached screenshot. Can you try the same method that helped there also on the header?
In any case, I've escalated this issue to our second-tier supporters.
The method used in the screenshot section cannot be applied to the header CTA button, as the button is currently part of an A/B test (Divi Split Test).
Thank you for escalated this issue to second-tier supporters.