The special Search Character buttons are larger on iPhones than on Android phones. That means that in some cases if there are more than five or six of them, some of them aren’t visible. Here are two screenshots from Android and iOS:
I tried to edit the buttons in Styles but it didn’t work.
What is the screen pixel count of each screen you show? That is the width by height pixel count?
I asked @david_moore1 to look into this. Visually, you can see that the iOS buttons are wider.
On android, what happens if the number of buttons exceeds the width of the screen?
They get pushed out too. But ten of them can fit.