IPv6 configuration to radio

Hello all,

In my current configuration wan is dhcpv6. On radio(VAP) it radiating ssid with-out encryption.
Mobile device connected with that VAP, is reaching to server. It is authenticated by radius.

It is getting IPv4 address on connecting with radio.

What configuration should I make, so mobile get IPv6 on connection with VAP ssid?

It is getting SLAAC IPv6 address only.