Reality Check,
Just read the citations offered by that link!
I read the citations offered by the link

! Any one who can read can see that R. Daubenmire, “The western limits of the range of the American bison,” Ecology, vol. 66, no. 2, pp. 622–624, 1985 is about the western limits of the range of the American bison

!
This is evidence that HM is wrong when it assumes that all of the grasslands of the west did evolve in the presence of large herbivore herds because bison were not significant west of the Rockies

ETA: As you quote
Archaeologists hold that at least two species of Bison occurred west of the Rockies at the close of the Wisconsin glaciation .....snip..... It became extinct as a wild species west of the Rockies early in the 19th century.
(i.e. just 2 species ~11,000 years ago and you do not quote the numbers).
You ignore the other 2 references
* 9. R. N. Mack and J. N. Thompson, “Evolution in steppe with few large hooved mammals,” American Naturalist, vol. 119, no. 6, pp. 757–773, 1982
* 13 .G. Wuerthner, “Are cows just domestic bison? Behavioral and habitat use differences between cattle and bison,” in Proceedings of an International Symposium on Bison Ecology and Management in North America, L. Irby, L. Knight, and J. Knight, Eds., pp. 374–383, Bozeman, Mont, USA, June 1998.
Holistic Management: Misinformation on the Science of Grazed Ecosystems
These publications by Savory and his colleagues show that HM is based on the following assumptions: (1) plant communities and soils of the arid, semiarid, and grassland systems of the world evolved in the presence of large herds of animals regulated by their predators ...
We address these five assumptions of HM with a focus on western North American arid and semiarid ecosystems, principally in the desert, steppe, grassland, and open conifer woodland biomes as described by [8]. We use the broad term, grassland, to be inclusive of these types.
2. Are Western North American Ecosystems Adapted to Herds of Large Hooved Animals?.
...
Conclusion. Western US ecosystems outside the prairies in which bison occurred are not adapted to the impact of large herds of livestock. Recent changes to these grassland ecosystems result from herbivory by domestic livestock which has altered fire cycles and promoted invasive species at the expense of native vegetation.
And what does western North America mean,
Red Baron Farms?
It does not mean only that part of North America that contains bison

! It does not mean just the Great Plains that are basically in the center of North America which is the historical range of the bison.
As the review paper states
Lands west of the Continental Divide of the USA, including the Great Basin, Sonoran, Mojave, and Colorado Plateau deserts, along with the Palouse Prairie grasslands of eastern Washington, western Montana, and northern Idaho, did not evolve with significant grazing pressure from bison (Bison bison) [9, 12, 13]. Though bison were abundant east of the Rockies on the Great Plains, they only occurred in limited numbers across western Wyoming, northeastern Utah, and southeastern Idaho [12, 14].
Thus the grasslands of
western Wyoming, northeastern Utah, and southeastern Idaho did not adapt to herds of large hooved animals (not even pronghorn antelope).