Admin Tool password

Hey, everyone. I recently moved and with that, I was given an XB8 router/modem. I am trying to set the router to Bridge mode but I have been unable to access the admin portal as the usual sticker at the bottom of the router isn't there.

Logins I've tried:

• admin / password
• account ID / password for the Xfinity app
• admin / password for the Xfinity app
• account ID / password
• admin / default config password for WiFi
• account ID / default config password for WiFi

I have also tried on Safari browser, Firefox, Brave, and Chrome for logging in. I've seen other posts that the Admin Tool functions are being moved to the Xfinity app, but the Xfinity app tells me that those functions are automatically configured and I am unable to configure them. I tried calling Xfinity support but they stated they do not give out the password anymore. Is this a case where I will have to purchase my own Modem or VPN tunnel into my network for my homelab?