The signing key used for RPM packages (and I assume other package types) is no longer valid on newer operating systems since the key is SHA1 and these newer operating systems have deprecated SHA1.
Specifically, I'm trying to install elasticsearch 8.6.1 on a RHEL 9 system and get this when using your directions to import the signing key
rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch warning: Signature not supported. Hash algorithm SHA1 not available.
There have been numerous topics opened regarding this issue in the forums, and none of them have ever received a public reply and have been closed due to age. I'd rather not have to bypass the gpg check in dnf, and I really don't want to enable SHA1 system-wide. Please create a new/additional key with SHA256/512 so the packages can again be managed with a package manager.