Also not allot of 3rd part repo are just disabling & deleting repos for EL7.
So yes, for now, Red Hat has the CentOS 7 Archive going, but given their history, who knows for how long.
I know some mirrors, who are just removing the CentOS 7 repos all together to save space for other active projects.
Best bet is to switch over to AlmaLinux 8 to avoid any security breaches due to unpatched servers.