Migration to NFV 3.0

Hi,

Currently I has three related questions and go from more generic to more specific

Are there any official procedure to migrate from NFV 2.0 to NFV 3.0?

If not are I think that the more difcult part will the migrate from NSX for vSphere to NSX-T. Are there any offical procedure for this: migration NSX for vSphere to NSX-t?

I think that can be helpfull for NSX migration if the same ESXi can manage switchs in both enviroment: one NSX for vSphere and other NSX-T, can we do this?

Thanks in advance and best regards,

Emilio J.