I've seen several toots and boosts about what data #Persona slurps up when you go through the process to be verified on #LinkedIn. Both @Ivovanwilligen and @BenjaminHCCarr shared good information about this.
To aid folks in requesting and deleting their data from Persona's system, you can use this helpful intake form, which is their #GDPR Data Subject Access Request form:
https://thelocalstack.eu/posts/linkedin-identity-verification-privacy/