Proxmox VE 6: Setting up IPv6 on 2 subnets, hetzner?

Question

Computer networks

Good afternoon Comrades!
Essence of the question:
There is a hypervisor with IP: 135.18.XX.YY6 Virtual machines are spinning
on it, which receive IP4 through additional IP: 135.18.XX.YY5, 135.18.XX.YY6, 135.18.XX.YY7.
IPv6 is also attached to these virtual machines, all this goes through vmbr0 and there are no problems with this, everything works clearly and stably!
Immediately make a reservation hetzner gives IPv6 from its subnet of the form 2a01:4f9:ff:ffff:: / 64

Next: there is a subnet 65.10.ZZ.YY4 / 29
This subnet is configured via vmbr1 and everything works fine too!
And now the question with which I struggle for a very long time. How to tie IPv6 addresses from subnet 2a01:4f9:ff:ffff:: / 64 to this subnet that goes through vmbr1 ???
those. how can I tie IPv6 addresses on both vmbr0 and vmbr1 ???

My config:
auto lo
iface lo inet loopback

auto enp3s0
iface enp3s0 inet manual

auto vmbr0
iface vmbr0 inet static
<------>address 135.18.XX.YY6/32
<------>gateway 135.181.XX. YY5
<------>bridge-ports enp3s0
<------>bridge-stp off
<------>bridge-fd 1
<------>pointopoint 135.181.XX. YY5
<------>bridge_hello 2
<------>bridge_maxage 12

iface vmbr0 inet6 static
<------>address 2a01:4f9:ff:ffff::2/64
<--- --->gateway fe80::1

auto vmbr1
iface vmbr1 inet static
<------>address 65.10.ZZ.YY5/29
<------>bridge-ports none
<------>bridge-stp off
<------>bridge-fd 0