Personally I think Swift can be a good choice that is more familiar to existing C++ developers than the others, and a lot of people seem to be sleeping on it.
It has full native interop with C and C++ so you can already use all your existing libraries. Historically it lacked cross-platform support but this is not true anymore. It does lack a native GUI framework, but for now you can keep using C++ ones.
Some people complain about its ties to Apple, but hopefully with it gaining much wider cross-platform support, it may not matter that much in the future, but I guess it remains to be seen.
Swift, while being slightly more friendly for extreme beginners than rust, is just so kneecapped and bloated that it has the opposite problem as rust. At some moderate level of competence it actively hinders learning. All of the weird closure and multithreading syntax is more harmful than good. Whereas Rust has a high floor and somewhat infuriating borrow checking, once you figure your way out of them you’ve actually learned a lot about how computers work along the way.
Swift syntax did feel overly fancy to me too. Look at how complicated and version-dependent the StackOverflow Swift answers are for conceptually simple things.