Switching from Nikon D810 any suggestions (photography)

I’m switching from a Nikon D810 due to sony having a larger lens selection. I was thinking of either the A7 iii or the A7 IV or Z7 ii. (Or is the D810 better than any of these i dont want to downgrade either stay the same or upgrade)

I currently also have the A6700.

Would you recommend any of these or just simply sticking with the A6700, I take lego macro photography and landscapes looking for good quality also selling my nikon lenses and will be buying ones for the sony so not sure if i could use A6700 lenses on higher end sony products if i ever upgraded.