Hey again @carol.haak !
Google Sheets allows you to paste multiline text into a single cell provided you press Enter inside it first. So, for example, a snippet like this pastes text across cells:
a{key: tab}b
c
In this case, you can add {key:enter} after the tab to force pasting inside a single cell, like so:
a{key: tab}{key: enter}b
c{key:tab}{key:enter}d
e{key:enter}
This snippet gives us this result:
Let me know if it works for you!