You can put a sequence in a parallel action
It’s explained clearly in the docs:
It is also possible to run a group of actions sequantially inside the parallel actions. The example below demonstrates that:
script:
example_script:
sequence:
- parallel:
- sequence:
- wait_for_trigger:
- platform: state
entity_id: binary_sensor.motion
to: "on"
- service: notify.person1
data:
message: "This message awaited the motion trigger"
- service: notify.person2
data:
message: "I am sent immediately and do not await the above action!"
Oh wait, you already knew, but you want it in the GUI…