There was an answer to a similar question: “View > Status Bar will display the status on the bottom of the window. On the right hand size choose between Single / Multiple View or Book. You can also change the size of the displayed pages.”
Apparently I need to start a new post – since I do not see the noted option once I invoke ‘View’.
TIA
Maybe you want to see another page, not adjoining the current one, at the same time, for example to write an introduction. Click Window > New window. Arrange both Windows side by side
Hard way:
Choose menu View - Zoom - Zoom… and check Columns.
Easy way:
Select the two equal pages icon (Multiple-page view) in the Status bar.
EDIT:
More LibreOffice Help on Zoom & View Layout.
EDIT 2: Maybe you need to check Status Bar in menu View.
Tested with LibreOffice 6.4.7.2 (x86); OS: Windows 6.1.
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I can’t find the icon in your screen-shot 
Then enable View>Status Bar
Not knowing which version you are using, try LeroyG’s Easy way. If the Multipage View doesn’t work try the ‘Book view’. It works great on my setup.
LibreOffice v7.6.4.1 (X86_64) on PC Windows 11 [v 10.0.22631.2861]