The spec sheet in the OPs
link says
"Goodyear Transit Tour, 27.5x2.0" which are 50-584 (n.b. The tyres in the spec may not be the tyres fitted).
Tyre Guide.png
From the tyre guide the first figure in column 1 and the tyre diameter in column 5 are key.
The tyre size the guards are designed for is 700 x 44, which falls between the two sizes circled in red. 44 is the max width figure, the diameter approx 711.
The tyre size circled in blue are 50 width, 684 diameter.
A number of pics of the bike show it with mudguards.
Ask the dealer which set they recommend?