Is it Mandatory to send an E-mail to share our updated Privacy Policy?

Is it Mandatory to send an E-mail to share our updated Privacy Policy?

Q: Is it mandatory to send an e-mail to all contacts in the database to share the updated privacy settings of the company?
No data is collected from our website, only contacting potential leads via Social Media (Legitimate interest) then engage with contacts to process their data (Only with express consent) No data is processed without explicit consent.