Forgive me in sounding a bit rancorous, but in my 20+ years of using AIX, I have never been able to spot recent or even up-to-date OpenSource software readily available for AIX.

On systems that - by their standard - come with that ancient versions of software you use on a daily basis, the first thing to do is take control: find yourself the best version of perl to match your project. That version should show a PASS on CPANTESTERS (currently down, but I hope back up very soon) for all the modules you plan to use.

Then install that version as your production version in a location that does not conflict with system perl. /yourcomapy/perl might work very well.

Then amend your $PATH to make that perl your default perl and install all the additional modules you need with cpan or cpanm. As of now you have no more dependencies on whatever (stupid) change IBM thinks useful for system-perl.

One final advice here though, which triggered me to reply at all: do NOT use Spreadsheet::XLSX. It is dead, unmaintained, buggy and deprecated. Please take the time to make the switch to Spreadsheet::ParseXLSX.