From Minimum hardware requirements | Microsoft Docs:
However, it appears that over the years purchase of 32-bit devices has been overtaken by 64-bit. via Bleeping computer: RIP: Microsoft to drop support for Windows 10 on 32-bit systems"
Windows 10, version 2004 is rumored to be released the last week of May, likely the 26th - 28th.
* Beginning with Windows 10, version 2004, all new Windows 10 systems will be required to use 64-bit builds and Microsoft will no longer release 32-bit builds for OEM distribution. This does not impact 32-bit customer systems that are manufactured with earlier versions of Windows 10; Microsoft remains committed to providing feature and security updates on these devices, including continued 32-bit media availability in non-OEM channels to support various upgrade installation scenarios. (bold added)
However, it appears that over the years purchase of 32-bit devices has been overtaken by 64-bit. via Bleeping computer: RIP: Microsoft to drop support for Windows 10 on 32-bit systems"
Microsoft does not offer statistics on the number of devices continuing to use Windows 10 32-bit, but the Steam Hardware & Software Survey: April 2020 shows that it is in limited use.
According to Steam's hardware survey, only 0.20% use Windows 10 32-bit while 86.08% use Windows 10 64-bit.
Windows 10, version 2004 is rumored to be released the last week of May, likely the 26th - 28th.