After reading this post, it appears that the Archer MR600 V2 does not support 464XLAT.

'After inserting a SIM card into certain TP-Link 4G/5G routers, some users may experience no internet connectivity or find that specific apps or websites cannot be accessed. Upon checking the internet status, the router receives an IPv6 address but does not obtain an IPv4 address.'

 

Reference: https://community.tp-link.com/en/home/forum/topic/604130

Could you please confirm whether the Archer MR500 and Archer MR600 V5 currently support 464XLAT?

Additionally, is there any firmware update available for below VX420 4G Modem to enable 464XLAT support?

https://www.tp-link.com/au/service-provider/xdsl/vx420-g2h/