Database sections missing in AZ-900

Hi

When working through the AZ-900 course in the database section (7) it feels like there are a couple of sections missing. In the summary at the end of the chapter it states that we should have covered the following: 

1. Azure Database for mySQL

2. Azure Database for Postgre SQL

Are there missing sections for these two DB’s or are they just meant to be covered in the summary section.

Thanks,