18.7.8 iOS and iPadOS are available for most devices too as of 4 days ago. I guess the gist is that not everyone wants to be forced onto liquid glass and worse performance balanced by the downside of vulnerabilities of missing security updates, but Apple relented to support the current and previous major OS versions as they traditionally did. It was an underhanded rug pull to stop supporting an OS on numerous products without warning. I anticipate support of 18 will cease when 27 arrives in 4-6 months, which will be sad.
I’m on a 16 pro and I’m holding out on 18 as long as I can. I have not heard a single positive review of 26 from people I trust. I usually update Apple stuff as soon as I can, so this is a departure for me.