For Android phones, the information “Suspected spam call” appears in the call log.
Your interlocutor can manually unblock your contact in the “block calls from unidentified people” option via their phone.
Caller ID by Google displays the names of businesses and services that have a Google My Business listing. Caller information from work or school account directories is also used.
To prevent your calls from appearing in SPAM, you must update your Google My Business profile and check that your establishment's information is up-to-date.
https://support.google.com/business/answer/6335800