Upload a signed PowerShell script to GitHub repository

Question

I've recently updated a series of scripts that I maintain with Authenticode signatures to add some additional security/verification/comfort to those that are using them.

However, when I upload the scripts to GitHub (either a commit via VSCode or via the browser), if I download the subsequent PS1 (or copy paste the raw contents), the resulting file is not signed. If I copy and paste the contents of the properly signed file that I have locally, it retains the signature.

I've see a lot of posts on HOW to sign the scripts, but I haven't seen any posts on how to properly publish them.

PS C:\Users\jim\OneDrive\Desktop> Get-AuthenticodeSignature 'C:\Users\jim\OneDrive\Downloads\MYReport.ps1'


    Directory: C:\Users\jim\OneDrive\Downloads


SignerCertificate                         Status                                 Path
-----------------                         ------                                 ----
                                          NotSigned                              MYReport.ps1


PS C:\Users\jim\OneDrive\Desktop> Get-AuthenticodeSignature 'C:\Users\jim\OneDrive\Documents\Code\MYReport.ps1'


    Directory: C:\Users\jim\OneDrive\Documents\Code


SignerCertificate                         Status                                 Path
-----------------                         ------                                 ----
C2048FB509F1C37A8C3E9EC6648118458AA01780  Valid                                  MyReport.ps1