Putting money on a fidelity (new) CD that’s from other banks. Questions.

I’m asking sub specifically because I’m used to fidelity for buying stocks. I’m seeing new issue cds at 5% rates for 3 and 5 years and are from different banks. And mentions that are fdic insured.

So I wanted to see if there’s something I might be missing in the way that fidelity does this. Some banks like Wells Fargo offer cds for like 1% rates while inside fidelity I can see Wells Fargo offering a much higher rates for new cds so I don’t get why, making me think it’s something else,maybe?

I called a rep and they mentioned that some are fixed rate vs variable rate. So that was news to me even after looking for a while. I also see yields and coupons and frequency that’s not difficult understand but it’s the same format than bonds so wondering if there’s something that’s related to bonds.

I just want a normal cd with 5% rate for 3 years. That’s fdic insured and no surprises. Will keep it there for 3 years.

Anything that I might be missing or should be on the look out for?

Thanks.