Want to divest from several specific companies that are in index funds in my retirement account. How?

I have never been particularly savvy when it comes to investing. I have a few index funds and my Fidelity account is professionally managed. I also have a 403B that is professionally managed separately. I have never paid much attention to it. However, yesterday I looked into which specific companies make up these index funds and some of these are Tesla, Meta, Amazon and more that I have personally boycotted and was dismayed to see that they are in my stock portfolio. Am I able to call up my managers for these respective accounts and give them essentially a 'no fly' list for companies I never want to see in my portfolio? How does that work?