Hi again @Fresch,
Unfortunately, this is a limitation of the latex command in Maple 2022. The ?latex article has a note that,
DocumentTools objects like Tabulate, or Tables (not mathematical table objects) inlined within Text are translated only rudimentarily: all their columns centered. Here too, either you can adjust the look of the table directly in the .tex exported file, or transform the table into an image to be handled the same way as an embedded component explained in the previous item.
so the look can be adjusted in the .tex after it is exported, but there is not currently a way to preserve the formatting upon export. We apologize for the inconvenience.