These older Creative Cloud versions are also compatible but may lack modern feature sets.

Unlike the full CC version, Photoshop Elements 2020 was one of the last consumer-grade versions to maintain compatibility. How to Download and Install

Downloading and installing for Windows 8.1 requires specific versions, as modern releases of Photoshop (version 21.0 and later) are generally incompatible with this operating system. The most stable and officially supported version for Windows 8.1 is Adobe Photoshop CC 2018 (v19.x) . Compatible Versions for Windows 8.1

Because Windows 8.1 is no longer supported by current Creative Cloud development, you must target older releases.

For users with perpetual licenses, CS6 remains highly compatible and stable on Windows 8.1 systems.

Direct downloads for these older versions are rarely available on the main Adobe website , but they can be accessed through specific Adobe direct download links or the Creative Cloud desktop application if you have a paid subscription. Downloading PS for Win 8.1 - Adobe Community