If I think wildlife I think Z8 or Z9 for bodies and none of the other Z mount bodies out there.
There are so many routes to take on the lenses and depending on the subject, style of shooting, ... can you consider these:
70-200mm f/2.8 --> great for the mammals close-by and have your animals in the scene rather than closeup shots
100-400mm --> a relatively light versatile lens for the mammals out there. Also great for close-up shots of flowers, insects, ....
400mm f/4.5 --> beautiful lens that gives insane sharp photos and nicely rendered background
180-600mm --> absolutely very versatile, nicely prices but a bit heavy to be fair. It is also not an S-line lens
600mm PF --> what is there not to like about this lens, sharp, small and light but is "only" f/6.3
800mm PF --> same as the 600mm PF
400mm f2.8 & 600mm f/4 --> well, the best in class, period.
Macro is such a specific field but if you are into that then the 105mm MC is the one to have.
When I travel to Africa for a safari do I take the 100-400 or 180-600 with me along with the 600mm TC. When a buddy travels with me will he take my 24-120mm f/4 lens with my old Z7.