I agree that it is probably reshaped.
The Chinese Shan/Dai minority also made them with this profile from the get-go, but the rest of the
dha is not typical Chinese Shan/Dai work. Such swords usually don't have a groove, for example, and their tips are thinner in thickness. But who knows, maybe someone from that minority purchased and altered the tip to their taste.
For comparison, here is an otherwise quite similar piece I had with a date on it. This was probably the original shape of yours, looking at the groove. I think yours is probably roughly from the same period.
https://mandarinmansion.com/item/burmese-dha-dated-1928
For reference I add a photo of a more typical Chinese Shan/Dai piece. Characteristic for this culture, spread over Burma and Yunnan, are the large garlic shaped pommel, the style of the silverwork, and the blade profile.
Peter