There are “options” to add better Reno scenery to your Sim – ( Maybe even more detailed and extensive than that in the Asobo Reno Expansion)
ie
PAYWARE
https://www.islandsim.com/reno-tahoe-intl-msfs20.html
FREEWARE
( looks quite good from the Pics – maybe it even has Pylons ??
But agreed, its a shame that the Scenery from the Reno Expansion, only shows up when participating in Races – but there are options