Emails from accounts that I have not created?

I've been getting a bunch of emails from sites like TikTok, Pinterest, Twitch, etc. For a few days, which then say something like "Your confirmation code is…" or similar stuff. I never created an account there and unsubscribed the e-mails, which only worked on a few pages. I have also changed my password but still receive these emails. How do I get it away?

Just have more details shown & see if the emails even begin to have meaningful senders, may be emails that somehow bypassed the spam filter or simply slipped through.