Number of services installed by default (using PowerShell’s Get-Service | measure):
1511: 196 services
1607: 212 services
1703: 223 services
1709: 234 services
1803: 239 services
1809: 257 services
1903: 246 services
1909: 251 services
2004: 248 services
20H2: 261 services