This made me happy. I had a second hand iPhone 13 mini stuck on 18.2 with no upgrade path other than iOS26 (which is not a good fit for the 13 or my eyesight) - now I updated within iOS18 and afterwards can update apps that require a minimum of 18.6. (like ice cubes for mastodon)
Thanks. Turning off beta releases brought up the ios26.4 screen and, the 18.7.7 update which is invisible until you guess to scroll, or someone suggests that you scroll.