Hello. I confirm webgl antialiasing is not working on iOS after recent update. I can reproduce an issue on Safari and Chrome browsers.
Webgl setup:
Three.js library,
WebGLRenderer { antialias: true }
The problem exists on following setup:
IPhone 12 mini,
iOS 16.4.1 (a),
The problem is not the case on:
iPhone 6s,
iOS 15.6