If you need additional monospaced fonts beyond the pre-installed system options (like SF Mono or Courier), you can install custom fonts on iOS 15.4: Safari 15.4 Release Notes | Apple Developer Documentation
System apps like Apple Mail allow users to view messages in fixed-width fonts to maintain the alignment of text intended for table-like structures. How to Download and Install Fixed-Width Fonts ios 15.4 fixed space -font- download
Safari 15.4 (bundled with iOS 15.4) added support for the ic unit, which is equivalent to the width of a specific glyph in the current font, aiding in more precise web layouts. If you need additional monospaced fonts beyond the
While iOS 13 introduced the system font , iOS 15.4 and related updates refined how these fonts are accessed and rendered: ios 15.4 fixed space -font- download