Not receiving 2FA codes on Sms

I'm experiencing a persistent issue trying to access my Meta account—the one I use with my headset. Every time I attempt to log in, I'm prompted for a 2-factor authentication (2FA) code (OTP), but I never receive the code on my phone, I don't have the recovery codes as well. I've exhausted all troubleshooting: attempting login from different devices, browsers, and networks. To rule out problems with my number, I tested receiving OTPs from other, non-Meta services, and those arrive instantly—so the issue is clearly on Meta's side. I even tried accessing my account via the account center with Facebook and Instagram, but still hit the same 2FA roadblock. What makes this even more frustrating is the lack of support: live chat appears to be gone, and posting here requires being logged in. How are users locked out supposed to get help? I had to make a brand new Meta account just to raise this issue. There needs to be an open channel for locked-out users who can’t get through 2FA. Please advise on next steps for recovering access.