Add "Line Breaks" To SharePoint Calendar

https://imgur.com/a/v7GDTnu

I have a vacation calendar set-up on our Sharepoint at my work. I've created a column named PTO with multiple lines of text selected and left the defaults for all the other settings as shown below.

See Photo 1

My hope is to add multiple staff to a single new item activity as an all-day event, instead of adding each of my staff individually as all-day events (time saving process). Well, when I add a person in the PTO column I created, I press "enter", the line appears to break, so I can add the next person.

See Photo 2

Well the results on the calendar appear differently than what I typed in my new event, by merging names together and such.

See Photo 3

I also went to the Calendar Tab > Modify View, and changed the Calendar Colums for Month View Title to the PTO column I created.

Is there an easy fix for this? Do I have the wrong setting check marked? Do I need to add something to JSON? Is it even possible?

Thank you.

Jeff M.