The Verizon E3200 extender expects additional information from the Verizon E3100 or CR1000A router in its DHCP handshake to let it know its paired with a compatible router.
To fix it you can put a file named 11-verizon-options.conf in the /etc/dnsmasq.d/ folder with the following lines. Put your router's serial number and model number in the last two lines
# 11-verizon-options.conf to provide additional DHCP information required for E3200 extenders
# Announce ourselves as a Verizon ARCADYAN router at all times
dhcp-option=option:vendor-class,ARCADYAN
# For Verizon devices that identify themselves
dhcp-vendorclass=set:VerizonFiOS,Verizon BHRx1 DHCP Detect
# Emulate Verizon router
dhcp-option=tag:VerizonFiOS,vi-encap:3561,4,880355
# replace with your Verizon Router's serial number
dhcp-option=tag:VerizonFiOS,vi-encap:3561,5,ABC12345
# Verizon Router model, G3100 or CR1000A or CR1000B
dhcp-option=tag:VerizonFiOS,vi-encap:3561,6,G3100