Rechecked the settings.
Seems like when I clicked “I want to sync Unreal Project” during the installation GitHub by default created the following list of ignored files:
*.sdf
*.VC.db
*.VC.opendb
# Precompiled Assets
SourceArt/**/*.png
SourceArt/**/*.tga
# Binary Files
Binaries/*
Plugins/*/Binaries/*
...
# Compiled source files for the engine to use
Intermediate/*
Plugins/*/Intermediate/*
# Cache files for the editor to use
DerivedDataCache/*
■■■■ it.