If you feel uncomfortable, ask him to carve it again.
In order to facilitate writing and lettering, sometimes calligraphy or lettering may be engraved with such words.
I don't know what your seal is for. Generally speaking, China's Trademark Law and other laws and regulations stipulate that trademarks and brands should use simplified words and standardized words. Except those specially approved. For example, the national character of "Bank of China" is "Guo", because considering that China Bank is an old brand that existed in the national government before the founding of the People's Republic of China, it has its particularity, so it can be used by special approval.