It’s up to you as the programmer! The library literally gives you the power to roam/connect to whatever you want whenever you want.

Yea, it's not super clear but that's indeed what I meant to say :)

Then change your code.

Every AP has a bssid (MAC address) that you can use to connect to specific AP.

It’s up to the code to figure out which one to connect to. The libraries have all the options.

When you do a scan you get bssid of the AP and strength of each signal. You can make a determination of when to rescan and reconnect.