Jiofi Ipv6 Subnet

[popcorn]

Hi all,
I have a jiofi and below is my setup:
Jiofi with APN set as only IPV6 so will only get internet in ipv6.
D-Link DIR 615 Repeater router who gets a IPV6 from Jiofi. SLAAC IP is assigned as 2405:204:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx

I want to use IPV6 from the DIR 615 router on various devices, but I am unable to get setup LAN IPV6 on DIR 615 router.

I tried to do a DHCPv6 and slaac and with prefix all combination, but no success.
Please help if you can guide