How should one show evidence when working in the aviation industry?

1

Hi all,
I am from the aviation industry and I played a pivotal role in the development of a system. I have a recognition letter from my managers stating the same, but I have zero contributions on GitHub due to job restrictions as we having our own repository system and customized cloud.
In the OC , what kind of evidence should I submit?

2

You can show screenshots of a private repo that is redacted but shows your name as one one of the contributors, also back it with a reference letter.

3

Thanks for quick response, but I resigned the company and don’t have the access to portal so that scenarios what is the way forward?

4

Can you get in touch with your previous workplace and ask them for screenshots?