Multi project dependency management

Hey so I've been wondering how you guys handle multiple service repositories and their dependancies for e.g. Dotnet projects. Assume you had service A, B, C etc all in their own repos(loosely coupled microservices) and they all reference e.g. Azure.Identity. Instead of updating each repo every time there's e.g. a vuln there must be some sort of automated way to handle updates surely so it auto updates and keeps everything in sync. I vaguely remember about Google having essentially a department just for this and at that large a scale, it was warranted and worked but a beast to manage otherwise(although I can't find this anymore so wondering if I imagined it).