There are very distinct examples of different era, with 19th-century, 20th-century, and 21st-century periods in full splendour. This can be seen in various Instagram groups, which alas are not as open/public as I would prefer. [1]
Do you see much older signage and typography in Vietnam? In the villages versus cities?
It always impresses on me that a city, itself, is an open book for typography.
I wonder if you would be aware of any similar projects to "Fonts of Vienna", but for your region of the world?
[1] - e.g. https://www.instagram.com/fontsofvienna/