Recently I stayed in Terelj National Park, a mountainous area 70km northeast from the capital city Ulaanbaatar.
At Terelj the reception of MR (Mongolian Radio) on LW/MW was as follows:
164kHz (Khonkhor) :  all day strong and stable, but audio quality is bad 
209kHz (Choibalsan/Dalanzadgad/Ulgii):  evening hours only, only one station seems to be heard, (no mutual interference), weak
227kHz (Altai):  evening hours only, weak
882kHz (Murun): evening hours only, weak.
At Terelj, only MR 164kHz is audible with good signal. FM stations are not audible.
The aim of LW/MW transmission was to cover the wide rural areas for nomads (now about 20% of the people), it seemed to be effective in the 20th century. According the statics of radio listeners in 2016, those who listen to radio daily are 11% in Ulaanbaator, 10% in other rural areas, those who do not have radio receiver are 56% in Ulaanbaator, 62% in other rural areas. Nowadays most people, city people as well as nomads, get information and entertainment by portable phones in this country.

Takahito Akabayashi, Tokyo, Japan to WOR iog (2023-07-29)