Why its not realising 32-bit version?

Linux is a old and new computer use, and the obsolescence.

Now, linux and libreoffice are only working with 64-bit.

I need 32-bit libreoffice updates-

Why its not realising 32-bit version?

Because TDF decided that its limited resources are better used elsewhere.

As I understand, they decided to drop 32-bit builds after they concluded that the percentage of 32-bit Linux users had fell under 3% or so.

https://downloadarchive.documentfoundation.org/libreoffice/old/

What distro are you using that doesn’t offer LibreOffice in 32-bit, unless you’re using a completely unsupported OS now…

Some major distros like Fedora have dropped 32-bit support. OP’s claim is legitimate.

Not really. Anything of the OS’s that have discontinued 32-bit support it’s in EOL versions. So they’re totally without any support. Just move to a distro that is still supported, and issue is resolved. Using a distro that’s 100% EOL the lack of a good office suite is going to be the least of your issues with the vulnerabilities that it will quickly accumulate.