How to install iTunes on Mojave?

Solution 1:

1. Download a copy of macOS Mojave (you can get it here: https://support.apple.com/en-us/HT211683)
2. Download Pacifist from https://www.charlessoft.com/
3. Open Pacifist and drag the Mojave installer onto the window
4. Once it's done loading, go to OSInstall/Core.pkg/Applications/iTunes
5. Click the "Extract To..." button at the top of the window. Choose your /Applications folder and complete the steps to install it.

If you removed other parts of iTunes (so not just iTunes.app) you'll need to reinstall those as well. I'll assume you know what you've removed and can find them.