[ATTENTION] The new international version (22.214.171.12480) removed zh_CN support, login, and some other functions. If you still want full functions, or you want aarch64 support, you may need the Chinese version from https://linux.wps.cn here: AUR (en) - wps-office-cn
And indeed, the PKGBUILD of wps-office-cn indicates aarch64 support.
You could use debtap as a LAST RESORT to convert deb files, and then install them as local files.
As an aside, Libre Office seems to be more ‘compatible’ with MS Office as you can save MS Office files in the latest format. I think WPS saves files as an older version, which open in compatibility mode in MS Office.
You may also want to install/copy MS fonts into your Manjaro fonts database for even more compatibility with MS Office to avoid substitute fonts being used.