Math not correctly converted to typst: \mathbf should be bold and upright but is only bold

[j-horak]

Latex math expression is not properly converted to typst so that the final displayed result is different.

Expectation:

The Latex command $\mathbf{A}$ should produce a bold and upright letter like this $\mathbf{A}$.
In typst this is achieved by $upright(bold(A))$, so I expect to get this.

Reality:

I get just a bold letter, i.e., $bold(A)$.

Pandoc version?

See online pandoc example

Same result from quarto (v 1.4.549) with Pandoc v 3.1.11 .