[BGP IPv6] MikroTik don't receive default route

Dear MikroTik users.

I established a BGP session using IPv6 address, but MikroTik don't receive default route (neighbor router is correctly configured):

Version: RouterOS 6.49.15

/interface bridge
add name=loopback1

/ipv6 address
add address=5555:5555:5555::1/127 advertise=no interface=ether1 (advertise only works on prefix /64)
add address=aaaa:aaaa:aaaa:a::1/128 advertise=no interface=loopback1 (advertise only works on prefix /64)

/routing bgp peer
add address-families=ipv6 name=peer2 remote-address=5555:5555:5555::2 update-source=loopback1

/routing bgp network
add network=aaaa:aaaa:aaaa:a::1

/routing bgp advertisements print
peer2 aaaa:aaaa:aaaa:a:... 5555:5555:555... igp 100
peer2 5555:5555:5555::5... 5555:5555:555... incomplete 100

/ipv6 route print

DST-ADDRESS GATEWAY DISTANCE

0 ADC 5555:5555:5555::2/127 ether1 0
1 Db 5555:5555:5555::2/127 fe80::aa6d:5fff:fe64:... 200
2 ADC aaaa:aaaa:aaaa:a::1/128 loopback1 0

Please, can you tell me if I missed some configuration?

Thanks for your attention and help

Best regards.