CJA (Adobe Customer Journey) Bounce Rate / Engagement Rate as per GA4 definition

[DeniseSp]

All, I am new to Adobe, and I would appreciate your help with the following: 

Do you know how I can define bounce rates in CJA? Specifically, if I want the definition of a bounce to be similar to that of GA4:

Bounce rate is the number of bounced sessions divided by the total number of sessions over a specified time period.

A session is considered a bounce if it doesn't meet any of the following criteria: 

• The user stayed on the page for less than 10 seconds  
  The user didn't trigger an event (link clicks, video views...), 
• The user didn't move on to another page or screen. 

Or how to define the opposite, engagement:

nothing that Bounce rate = 1- Engagement rate

Google defines the engagement rate as the number of engaged sessions divided by the total number of sessions over a specified time period.

An engaged session is a session that lasts longer than 10 seconds,

had a key event (video, link clicks...) or

had at least 2 page views or screen views.

I have come up with the following filter definition for the bounces, but it has a couple of issues (adobe does not track when the user leaves, and I can not ensure everything happened on the same page):

I found the following definition in another post, but it gives me an unreasonable bounce rate (15% instead of around 56% in GA4).

I appreciate your help!!!

@Josh__Stephens

@Jennifer_Dungan