Cannot find debug info for glibc

Question

The gdb throws warning:

Missing separate debuginfos, use: yum debuginfo-install glibc-2.28-127.el8.x86_64

but the debug info cannot be found!

sudo yum debuginfo-install glibc-2.28-127.el8.x86_64

Could not find debuginfo package for the following installed packages: glibc-2.28-127.el8.x86_64
Could not find debugsource package for the following installed packages: glibc-2.28-127.el8.x86_64

The repo list:

yum repolist
appstream                                                                                                 
baseos                                                                                                    
debuginfo                                                                                                
extras                                                                                                    

How can I fix this problem? SYSTEM INFO：CentOS8 x86_64