It's about high drive pins.
On page 15, there is:
7.5 High drive pins
The four pins PA20, PA21, PA22, PA23 have high drive output capabilities. Refer to Figure 32.
on page 601 for electrical characteristics.
but on page 38:
11.7 High Drive Current GPIO
Ones of GPIOs can be used to drive twice current than other GPIO capability (see Electrical
Characteristics chapter). The list of those GPIOs is shown in Table 11-9.
Table 11-9. High Drive Current GPIO
So which one is correct?