Samsung refrigerator AP not connecting to ATT wifi network

My new Samsung refrigerator wireless network showing up on my iPhone, along with my AT&T home wifi router/network. Network is named with various numbers and letters, i.e., “fridge_E30xxxxxxxxxxx”. I can’t seem to get past its AP mode (access point) on the fridge, it has to be able to use my home wifi to access remotely when needed. I’d like to turn on/off icemaker remotely, etc. Or go into a vacation mode.
Any tips on what is holding it back from getting the fridge working with the Samsung “Smart Things” app? Do I need to configure the wireless access point (AP) in the home router? Could a firewall be holding it back?