Generally speaking, removing a user from the sync scope should result in deleting his account in Entra. There are however some scenarios where this will not happen or a full sync might be required. The best thing to do here is check the Metaverse/Connector spaces for a given user, example steps are detailed here: https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/tshoot-connect-object-not-syncing#connector-space-object-properties
A somewhat streamlined experience for the same steps is available via the Troubleshoot task: https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/tshoot-connect-objectsync
In any case, you can remove users directly from Entra, if needed.