Not supported by gnupg, who decided to do their own thing, see librepgp.org. gnupg is slowly but surely fading itself out of the open source ecosystem, focusing

Not supported by gnupg, who decided to do their own thing, see librepgp.org. gnupg is slowly but surely fading itself out of the open source ecosystem, focusing more on enterprise (i.e. German government) use cases. If you are wondering how to openpgp these days, many use cases are well covered by SOP, which is a simple stateless interface specification with multiple mostly drop-in swappable implementations: https://wiki.archlinux.org/title/Stateless_OpenPGP https://wiki.archlinux.org/title/Stateless_OpenPGP