Sequence in Backend Workflows - external API call triggers before all records are created

A lot of comments show respect to this one:

However I’m concerned of the following line:

  • Custom events run in sequence, not parallel. If Workflow 1 triggers a custom event that starts Workflow 2, Workflow 2 will complete before the remaining actions in Workflow 1 run.

I have tried creating two custom events triggers and wrapped in them my two backend workflows. Result was the same.