You can add specific electronic genres for Beatport releases after selecting Beatport Distribution & Label Setup in the Advanced Stores section at Stage 4 of the Release Builder.
If you don't already have one, you'll need to purchase a Beatport Label to select these electronic genres. They're no longer available in the main list of genres on Stage 2 of the Release Builder.
Beatport Labels are a one-time purchase. That means once you have one, you'll unlock Beatport distribution for all future releases.
Please keep in mind that the Beatport genres you select at Stage 4 will only be listed on Beatport. The genres you choose at Stage 2 will be listed on all other platforms.