Interesting! I've tried 5x on my gf's 16 Pro and tbh I loved that. Comparing to my 2x it is night and day in terms of how much I can actually zoom, also portraits turn out wonderful. It doesn't work well in low light but it gets very sharp images of distant objects in good lighting. 17 Pro's upgraded telephoto (or, well, kinda downgraded 4x but with better res larger sensor) is my way to go. I do also use UW from time to time but only in ideal light and just for some fun perspectives.
Kinda tempted to compare actual optical 2x with "optical quality" 2x, it would be fun to see which one wins: cropped 48mp>12mp or actual 12mp