IFATCA Policy is:

Information regarding VFR flights should be published on VFR charts.

ANSPs should consider the impact of VFR/SVFR flights on the workload of Air Traffic Controllers, and mitigations should be put in place if required.

If VFR/SVFR traffic volume warrants, and the airspace structure permits, a dedicated VFR control position should be considered.

When appropriate, ANSPs should determine visual reference points (VRP), designated routes and procedures to manage the workload of the Air Traffic Controllers.