Email hacked with 2FA

I have 2FA on my gmail account that I’ve had for 20ish years. Admittedly, I didn’t have a very secure password. Within an hour of me checking it, all of my emails were completely deleted. I used the gmail recovery tool and they are permanently deleted with no possibility of recovery. Can anyone help me understand how this might have happened? Although my password was weak, I thought 2FA would cover me. I’ve changed all my email passwords, logged out …

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