How to forward traffic on TE-Tunnel; only on Core routers

I am very new to Mikrotik and having some MPLS-TE issue , I have following setup

PE1 and PE2 are PE routers and P1 , P2 and P3 are core routers

Client Router-PE1—P1-P2-P3-PE2-Client Router

I have established the TE tunnel from P1 to P3 and have setup VPLS circuit between clients via PE1 and PE2 routers . I am not able to forward mpls vpn traffic over TE tunnel but by defining static routes, IP traffic from PE1 and PE2 goes through TE tunnel but not MPLS VPN traffic. All setup is of Mikrotik. If I use Juniper as a P routers then I can forward the traffic through LDP tunneling over RSVP-TE feature but when Mikrotik as P routers I can only forward traffic on tunnel when it is end to end like from PE1 to PE2.
Any help would be highly appreciate. Thanks

There is no support for such feature currently. But this feature can be added to TODO list if there is enough demand. Please post references to any standards and other product documentation that explains this feature.