Add Cloud storage to teams Files Tab automation(powershell or graph API)

Hi Guys - I have very important requirement from client asking to add cloud storage link sharepoint to each channel. But this should not be manual effort , How can i achieve this , Practically not possible to add thousands of links manually So  please let us know how to automate this with any scripting like powershell or graph API  ?? 

As per client No matter what scripting we use but this needs to be automate.. Please suggest