15 Pro Max Unable to detect 6GHz (WiFi 6E). Fixed!

Got the 15 Pro Max as a prize a few days ago and it’s surely amazing until I noticed the 15 PM won’t detect the 6 GHz WiFi of my router. I’m using a 3-pack Deco XE75. 6 GHz has been enabled and set as Wi-Fi Network & Backhaul. iPhone 15 PM can’t seem to recognize the 6 GHz band(Apple states it is 6GHz ready.https://support.apple.com/en-us/102285) while an S23 Ultra has no problem connecting to it and has an excellent speed. I tried resetting network settings and followed Apple’s router setup settings with no good result.
The good news is I googled a similar thread on Reddit. The OP(https://www.reddit.com/r/iphone/comments/16w6e8d/15_pro_max_unable_connect_to_6ghz_wifi_6e/) here(Thank you!!!)shared his solution here:
Go to Settings -> Privacy & security -> Location services -> scroll to bottom system services -> toggle networking and wireless off.
After rebooting the 15 PM, I was able to detect and connect to 6 GHz WiFi!

If you met something similar with other Apple 6E products with TP-Link Deco, do give it a try!