Hey guys,
There is a specific issue exclusive to iPhone 15 Pro's and 160Mhz wifi channels.
iPhone 11, 12, 13 and 14's work perfectly fine with 802.11ax (Wifi 6) however iPhone 15 Pro's can't deal with Wifi 6 from Asus, Eero and UniFi Wifi 6 AP's (to name the most popular).
To clarify, if you have a Wifi 6 network at home, your iPhone 11-13 will work perfectly fine, but on the same network, your iPhone 15 Pro | Max will have a bad time.
As can be read more here:
discussions.apple.com
If you are having problems, disable 160MMhz channel and your iPhone 15 Pro | Max will work fine. However, you will lose a lot of speed.
Apple better fix this by 17.2 because paying a lot for a premium device, should never be released with basics like Wifi malfunctioning.