Source code verification and recompilation of Android + iOS projects

An existing contractor has sent us the supposed source code of two apps he has developed for us so far (each for Android and iOS). Unfortunately, our IT guy can't handle recreating these projects from the files provided.

STAGE 1

- verification of the completeness of the provided source files

- verification of the ability to recreate the projects from the provided files

- summary of the above points

STAGE 2

- cleaning up the delivered files

- restoration of the projects allowing to compile and publish the application in the stores

- uploading the projects to the indicated GIT repositories

Please quote me for STAGE 1 and provide the amount of STAGE 2 (in the comments). The idea is that if the sources are not sufficient to reproduce the project, naturally, to Stage 2 will not happen.