Public share with adressbook and email notification

Hello everyone,

I need to use Nextcloud for files sharing with a lot of people, like 2000.

I would like to know if its possible to do a public link and share this with an email notification to my adressbook/contact/users …

I tried the contact app but its not possible to notify a group and use a public link.
I tried circle app but same problem.
I tried to import user in DB and share with user group but its not a public link then people need to log in app for downloading files.

Do you have an alternative or idea for me ?

Thank you for your help.