status code 404 when installing on AWS EC2 REHL 9

[calduck2016]

hi guys,

when I'm running "yum install postgresql15-pglogical", I got an error msg:

• Status code: 404 for https://dl.2ndquadrant.com/default/release/rpm/packages/rhel/9/x86_64/15/repodata/repomd.xml (IP: 159.69.181.86)
  Error: Failed to download metadata for repo '2ndquadrant-dl-default-release-pg15': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

I'm running the steps according to the installation guide, can anyone help me figure out what's the problem? thank you!

my installation is on AWS EC2 for RHEL 9.3, and already have postgresql 15.5 installed on this server.
Product Name: Red Hat Enterprise Linux for x86_64
Version: 9.3
Arch: x86_64

[calduck2016]

after I checked the repo address, I found there's no repo link for RHEL 9. this link doesn't exist https://dl.2ndquadrant.com/default/release/rpm/packages/rhel/9/x86_64/15/repodata/repomd.xml , while the link for RHEL8 exists. So just wonder when will RHEL9 be supported? thanks!