That does not mean that the eBS team supports mod_plsql. No. But it gives more possibilities to integrate Apex on Apps.
- Oracle supports Apex
- Oracle supports mod plsql
- Oracle does not support customizations
- Oracle eBS does not support customizations
- Oracle eBS does not support mod plsql anymore
- Oracle eBS does not support Apex applications
So bottomline: Apex on Apps in R12 is supported within Oracle, but not by the eBS team.
The readme of the patch says :
Mod_plsql technology is supported by Oracle Server Technologies Support teams.
Oracle E-Business Suite Support and Development is unable to provide
instructions or diagnostic assistance on any issues that arise from custom
development using mod_plsql.