Tellos said:
[member="Mak Manto"] This I think makes more sense, the idea it's more high level resistance and immunity to certain things. I suspect those like luke can force push them into paste but only cause hell Lukes way past the 10 almost on the tropes super scale of insanity by this time.
It's not a resistance, not like Watto or Jabba the Hutt. It's not an immunity, not like the ysalamiri. The Yuuzhan Vong are described as entirely absent from the Force, or on another wavelength of the Force.
Those who are still cut off from the Force are described as "no different than rocks" in the Force and to try and sense them in the Force is to sense the space between stars in the night's sky.
Those on the other wavelength of the Force, like Jacen touched, must be accessed via Vongsense - which I interpret to "Vongsense" to be the wavelength of the Force that the Yuuzhan Vong reside on. To acquire Vongsense, you must somehow assimilate with the Yuuzhan Vong technology, such as the lambent lightsaber crystal Anakin uses or the amphistaff farm Jacen lands in.
Zonama Sekot is theorized to be seed of Yuuzhan'tar and capable of restoring the Yuuzhan Vong to the Force, so it's plausible that those that left with him at the end of the Unifying Force would have restored their connection to the Force through subsequent generations. However, there were several factions of renegade Yuuzhan Vong generals who did not follow Nas Choka at the end of the Unifying Force, and therefore there should be several Yuuzhan Vong still residing within the galaxy who are still cut off from the Force.
It's all about how you, as the writer, want to play them.