My iPhone WiFi shuts down everyday starting at 8am and all day i have to use LTE until 8pm when my WiFi decides to connect at that time. I have checked the router and modem/ unplugging or rebooting them and this still doesn't work.I have reset my net

Is the phone awake with the screen on? That is the only time WiFi is enabled. It shuts down when the phone goes to sleep to preserve the battery, unless the phone is plugged in.

I would suspect the router. Is there a limit on number of devices connected at the same time ? Is there a timer set for access ?

I can do both on my router.

Log in to the wifi router, turn off the disable internet on schedule.

What is the make/model of your wifi router?

Other than some strong form of interference affecting the signal, your phone should be working normally.

Have you reset the network settings?

That is alot of devices listed, can you give an exact number?

When the wifi is blocked for your iPhone, what errors do you get?
Does the phone say it can't connect to the internet or does the gear next to the wifi icon just spin and spin?

Which network are you using (2.4 or 5Ghz?)