Use whatever you want. See how quickly you can do all this:

title: stuff
author: me
date: Feb 6, 2024

Outline

Other stuff

Several sentences, including

• a
• list
• of
• points

# comments

print("Hello World!")

flowchart LR
   AA[Tx]
   AB[AB Processing]
   BA[BA Processing]
   BB[Rx]

   AA --> AB
   AB <--> BA
   BA --> BB