Unfortunately it doesn't help, but have a look at this post from the EA forum admis from 2024/08/22:
An update on the forums. | EA Forums - 4958254
Post rate limiter: Some folks found themselves temporarily locked down from posting because the system determined they had posted too frequently or recently. The rate at which real humans encountered this was way too frequent. We have eased the parameters on this, and folks shouldn’t feel the sting of this as much.
Maybe you have already noticed that post before, since it's already over a week old. I found it accedientially, when I was looking for official news regarding the state of these forums. My apologies if you already know that post.