Only about half way through LiS. But as the beginning of that video shows, there are vfx in many if not most of the outdoors shots, if only to put in the implausible backgrounds with the sideways mountains and fake trees. In contrast, it seems like VFX in Discovery are 90% used for space shots, which are of course 100% fake. I know that there are little VFX added into many of the live action scenes (holographic displays, turning the Pahvo vegetation blueish, etc) but these seem to be much more limited (other than the scenes on Vulcan, which were heavily CGI) to little things like adding weapons fire and 3D displays. Which actually makes it seem more "fake" in a way, because they're not seamlessly put together.
Honestly though, due to the structure of Discovery vs. Lost in Space, I think Discovery had the harder task ahead of it. The designers (both of special and practical effects) basically just had to come up with one set of designs for the whole season of LiS. On the other hand, DIS needed to waste time on designs which would be used for a single episode and then thrown away (like those weird butterfly-like Klingon fighters). In a certain way the series would have benefited tremendously from more, rather than less, serialization. Like, having a two-parter on Pahvo would have both made the location shooting cheaper, along with cutting down on the VFX budget (since they could use the blue sparkly aliens again).
Both shows use enhancements for their landscape shots: LiS for the weir geography of the planet. But DIS also had the entire sky changed digitally when they shot in Jordan in the pilot, and inccluded alien nests, and all the people-in-landscapes shots on Pahvo were heavily enhanced as well.
LiS has IMO less of those types of shots: They have a vfx enhanced wide shot: Showing the characters in the alien environment, but then all the close-ups of them walking through the woods are very rarely enhanced. Both shows are good in this regard.
LiS has just waaay less space scenes than DIS, which on the other hand look infinitely better. The same can be said for alien environments: Vulcan, the planet of the secret meeting in "Lethe", the zoom-in shots of Kronos: They all look massively underwhelimng compared to, say, the vehicles in LiS mingling with the starship on the quarrie.
What's amazing is how many different creatures LiS is bringing convincably to the screen: Not just the main robot, but also dinosaur-like predators (though they are always shown at night, so this helps), and various other alien being (the eels, crabs, butterflies, plants,...). DIS only has Ripper and Mudd's critter. As well as the Pahvoians (

OTOH DIS has definitely more show extensions - viewscreen/windows, forcefields, and lots and lots of phaser shots. But this is usually the stuff DIS manages to get right as well, they mostly only fail with the space shots - IMO because they have a thousand different starships and designs, but none of them are as finished or detailed as LiS' handfull of crafts and ships.