Hi Dinesh!
Yes, that’s exactly it!
Yes, I used it in a plugin called “Premium Blocks for Gutenberg”, because it allows a lot of graphic processing of the text (shadow, character spacing, etc.).
But by selecting the H1 flag, the font conversion works, only that it also changes all the H1s of the other pages, the fixed ones set by the theme (the page titles), which I don’t want.
I tried to intercept the lines in the CSS via the Google console, I tried many times but I can’t find the right lines, or maybe I’m doing something wrong in the syntax to write. I know I’m one step away, there’s not much left… eheh