How does one get iPhone to recognize wifi network of choice, as first choice? I am working in an office that has its own wifi network...but there are also cable company hotspots around. Every time I come in the office, leave the office, come back to the office...my phone goes on Optimum hotspot. I want it to choose the local office wifi network. I would like to prioritize my iPhone wifi networks, not just "forget" one network.

I have adjusted this for my macbook but not sure how to do it for the iPhone. Probably an easy answer but i do not know it so I appreciate any help. Thx.
If you have iCloud Keychain enabled, the prioritized list of networks from your Mac will sync to your phone, including the order. 

If you don't want to enable it, though, I do not know of any way to arrange networks on the phone by priority, except by forgetting them all and adding them in order of desire (the ones added earlier in the process will be preferred.)