I wouldn't believe I have been stuck on this for one hour, but it seems the fonts for extended unicode characters are not easyly available as TTF / OTF for use on computers, especially with graphic software where unicode fallback doesn't work
especifically I looking for the so called Math bold script
somehting like : (<- those are extended chars)
as in https://textfancy.com/font-converter/
as imagen at: https://snipboard.io/fNYd7w.jpg
(becouse I am not sure we all see the same glyphs)
Note: what I am looking for, is a standrd TTF font, which normal glyphs are equal to those extended glyphs, meaning that the A looks like the , B like , and so on. So I could use the font as normal font in every software.