Manually Connect To 5G WiFi

Hello there,

I recently have gotten a new WiFi router, and I only use 5G because I want to use my full gigabit speeds. I have been having a problem where my iPhone will not auto-connect and I have to manually connect every time I leave my wifi network. I have full signal, and I live in an apartment complex that has many wifi signals around.

Thanks!

iOS 13.5

MT6J2LL/A

Carrier Verizon 41.1