Further looking at your LO file.
There’s a dimension that isn’t connected to the model. Some others are difficult to read.
I see that you have modified the scene in LO which is not a good practice as it disconnect the viewport from the original scene.
It would be better to select the desired scale for the viewport from the Scales list in the SketchUp Model panel (make a custom one if there isn’t an existing scale) and then drag the edges of the viewport to adjust the size of it if needed.
You can also edit the style in SU and change the rendering to Vector.
I replaced the disconnected dimension and changed the font size for the dimensions so they are all the same but otherwise made no changes to the dimensions.