I did not realize there was a 32-bit version of Windows 10. Crazy. With a standard component, 16-bit Windows applications can still run on Windows 10 32-bit:

https://www.groovypost.com/howto/enable-16-bit-application-s...

Getting 16-bit on 64-bit Windows takes a little more work:

https://medium.com/hackernoon/win3mu-part-1-why-im-writing-a...

For the latter here is a working VM/layer partially based on Wine:

https://github.com/otya128/winevdm

It can be installed systemwide to get almost seamless support for 16bit Windows apps.

As much as Microsoft would love to kill 32bit windows, 16bit line of business apps are sadly still a thing in some large companies. Companies that may not have the source of or cannot for a variety of reasons port the code to 32bit or 64bit. Because 32bit windows can still run 16bit apps it will continue to live on in the consumer and end user space. But as far as I know windows server 32bit does exist but is not licensed such that it can be used in production.

Here you go: https://youtu.be/GgylNXTZxmA

>Is there a 32bit Windows 10?

Yes, all Windows 10 editions are availables in 32 or 64bit.

Yes, and yes. I saw some video of it once, so it can be done.