[CharlieDigital]

Great.

C# DevKit is really all you need (and the same plugins you would normally have like GitLens, etc.).

Refactoring experience isn't as good as Rider (JetBrains are kings of refactoring tooling). But for all other cases VS Code is fast and ergonomic.

Rider does have some nice things for supporting working with SQL databases that I do envy once in a while.

[neonsunset]

Just in case: DevKit is optional and requires an account, you can just use the base C# extension which is what provides the language server and the debugger, if you prefer VSCodium there's a fork of it which packs Samsung-authored netcoredbg instead of vsdbg so that is covered too.

For F# - Ionide works great, I like it a lot, integrates seamlessly with existing C# projects.