If I understand your rather vague Question you are asking about the allocation of names to Network Interfaces.
You should use Predictable Network Interface Names which have been used in other distributions for some time.
These are designed for multiple network interfaces to eliminate the enumeration race condition.
There is an option in raspi-config to enable predictable network interface names.
See Predictable Network Interface Names in How to set up networking/WiFi for further detail.
Use different wpa_supplicant files explains how to configure dhcpcd to use different wpa_supplicant.conf files for a specific wireless interface.
You may also want to look at Prevent dhcpcd from configuring a gateway on an interface