JSmithpvt

Sure it does Ubiquiti Flex Mini Switch

https://store.ui.com/us/en/products/usw-flex-mini

Use a wifi spectrum analyser app from the Play store or app store ... Make sure it has a decent amount of downloads and a good rating so you don't download a useless app that just wants your data

https://www.metageek.com/

This site has some interesting content that I saw quoted elsewhere here

https://support.metageek.com/hc/en-us/categories/200068854-General-Wi-Fi

I have a similar set up but with only 2 routers ... I was hoping to use one for work computer and the other for all my private devices but that doesn't seem to prevent work computer from snogging around in my private home network