what are the requirements for an electrical engineer?

A complete understanding of Murphy' Law. 

Under Biden you merely have to have the right skin color

He must walk upright and mumble in some recognized language. He must be able to spell injunear.

Attending and graduating from a nationally accredited university which offers a Electrical Engineering Degree through an  accredited college of engineering.

For an electronics and electrical engineer, I have found that a solid foundation in electronics (this covers analog and digital), physics, chemistry, mechanics & materials, and whatever specialty that your project requires is essential.

You don't need a university degree to call yourself an engineer (some of the best engineers I have met didn't have degrees). You need to understand how to apply basic principles and work up to what you are designing. I find that an engineer out of the uni takes about 5 years before they are useful, 10 years before they are proficient.

Some engineering (electrical & civil) requires a license to sign off on certain types of projects (generally anything that risks lives). The PE license generally is a 5 year endeavor after uni training.

A degree in engineering or a closely related subject (like physics), or years of experience as an engineering technician.

Really depends on the company hiring.