Maybe its because you haven't checked in years, because most of those artists you listed are there. I'm not sure about Damned, did you mean The Damned? If so, every artist you claimed as missing is available.

Alien Sex Fiend: https://open.spotify.com/artist/6WVnBgqJfj9Iw9gpBed9fJ?si=zd...

The Jesus and Mary Chain https://open.spotify.com/artist/4rjlerN21ygkIhmUv55irs?si=-y...

The Damned: https://open.spotify.com/artist/6VeL8VhaMjHTPc5uovFl3h?si=q9...

Soft Cell https://open.spotify.com/artist/6aq8T2RcspxVOGgMrTzjWc?si=va...

Sex Dwarf - Original by Soft Cell https://open.spotify.com/track/7A5qOucdF0zyXo2x7vAoCO?si=nno...

Sex Dwarf - Remastered by Soft Cell https://open.spotify.com/track/6TaHShmHB955lxcJ92V0gs?si=cXo...

Sex Dwarf - Original, Deluxe Edition by Soft Cell https://open.spotify.com/track/7bt41cmNUkjCP8CQekIwBO?si=0tl...