While all details are hidden from the publicly searchable WHOIS database (post-25th May 2018) by default; unless you have opted to show your details in the database (e.g. if you are a trading company). However, the gated WHOIS database still includes your registrant name and contact details which is made available by registry’s to parties with a legitimate interest.
Regardless of any changes – the public may not have access to registrant data, but the audience of the gated WHOIS is still sizable. This is where the WHOIS Privacy Service comes in. If you have opted for privacy on your domain, your data remains protected in the gated WHOIS database.