I there an overview somewhere of available add ons for ExpressionEngine 5? Devot:ee doesn't seem to go further than EE4. But I see lost of them on the individual sites of developers.
As a general rule of thumb: if it’s compatible with EE4, it’s compatible with EE5, too.
The jump from 4.3 to 5.0 was necessary to facilitate the change in license model, not because of breaking changes in EE’s APIs.