Sorry if I was not clear. Yes, I actually have multiple versions installed. I know because starting each on shows the version number of it.
I downloaded from libreoffice.org because Debian has no maintainer for libreoffice.
When the downloaded file is unarchived, it creates a temporary install directory arrangement with a DEBS subdirectory from which to install. Those directories are what I delete after install.
ls -l /opt
total 60
drwxrwxr-x 4 root root 4096 Jun 25 2019 ivideon
drwxr-xr-x 3 root root 4096 Jul 14 2020 libreoffice6.3
drwxr-xr-x 3 root root 4096 Jul 14 2020 libreoffice6.4
drwxr-xr-x 7 root root 4096 Jan 24 2021 libreoffice7.0
drwxr-xr-x 7 root root 4096 Jun 28 17:32 libreoffice7.1
drwxr-xr-x 7 root root 4096 Aug 26 16:23 libreoffice7.2
drwxr-xr-x 6 root root 4096 May 28 14:54 master-pdf-editor-5
drwxr-xr-x 9 root root 4096 Jan 12 2020 pdfstudio2019
drwxr-xr-x 4 root root 4096 Aug 25 2020 teamviewer
drwxr-xr-x 3 root root 4096 Mar 22 11:19 trueconf
drwxrwxr-x 20 root root 20480 Oct 23 2020 zoom