I just installed Visual Studio 2022 and I can't see the template for worker services. Does this no longer exist?
I had the exact same problem (worker service and blazor templates were missing) and this is what I did to get them back:
I guess the reason for my VS 2022 not having those templates at first was because I deselected F# components under 'Individual Components' in the installer, which then removed a few other tools and features as well.
I also saw an article online suggesting to install the .Net SDK (but it was already installed for me). Download .Net SDK
I speculate repairing VS did the trick because my internet connection was also not very stable at the time that I installed it the first time.