Last I knew, Rider was pretty much the only IDE available for a large codebase when you weren't on Windows. Much love for Ionide, but it was a serious struggle.
VS Code with Ionide is okay but has many limitations for example in debugging or lack of support for F# fsi scripts.
If you’re serious about F#, investing in Rider or Visual Studio makes a lot of sense.
Having said that I wrote a Neo4J data extraction tool a few months ago and chose to write it in F#. At one point I observed how funny it was that I was developing in a Microsoft language and yet my dev workstation runs Fedora and my IDE comes from JetBrains and my code is running in kubernetes on a Linux cluster and there is not a sight of a windows machine in this whole pipeline.
I remember the days when the language, linker, compiler, IDE, the GUI components, everything was tied together. If you wanted the next version of VB you had to buy the new version of Visual Studio!
Is this any better now?