Create Separate Title Tag and H1

I want to have a different title tag from H1 on a page, but this theme automatically makes them the same. Is there any way to not automatically set an H1?

did you tray with a plugging ?

this pluguien https://wordpress.org/support/topic/increase-headers-h1-h2-h3etc-as-needed/

i see this page of ebook
libroslara.com use here
you can try if work for you