It depends on the project. If you are making a code editor / ice then yes. Your project may not support working with assembly files. Sure, they are just plaintext (I think? Or are they binary? I think I might be confusing assembler source files and complied files which are machine code), but you get no tooling like autocomplete, go to definition, etc
Can something not have assembly support? It’s not like it needs support
It depends on the project. If you are making a code editor / ice then yes. Your project may not support working with assembly files. Sure, they are just plaintext (I think? Or are they binary? I think I might be confusing assembler source files and complied files which are machine code), but you get no tooling like autocomplete, go to definition, etc