Kind users, I've been trying for two hours to identify a font using the various online tools that can be used in LaTeX but I failed. I don't know if it's even a commercial font.
k that I highlighted with the rectangle color orange, to do a more accurate search, has a very specific name (eg. calligraphic or stylographic + name)? Could someone give me an indication how to direct me for a more targeted search? Thank you all.
The link of the image is: https://tobiw.de/en/gallery#oscillations-and-waves&gid=3&pid=6 and it is visible also in the related question here: https://tex.stackexchange.com/questions/501983/to-insert-an-aesthetically-elegant-and-stylish-letter-or-letters-for-mtpro2.
As by comment of the best user @Bill Kerr I adding the site of the links where I have tried to identify the fonts: