In case anyone else was wondering if this was a .io situation (that is a nominally ccTLD operated as a private enterprise within the USA, since 2017?), seems like no ... well ... except ... maybe:
the NS on mn. resolves to 2 logical-groups of servers:
The first, ns{1,2,3,4}.magic.mn, (currently) resolve to addresses in ASNs 45237, 24320, 9484, 56301 - all of which (and their blocks) are assigned through APNIC to entities/sites in Mongolia (Magicnet LLC, Railcom - Commercial Center, Mobinet LLC, and The National Data Center respectively) and ~geoping dbs seem to support physical routing to Mongalia
But the second cluster, and the only SOA records I scared up (though I didn't berate the root servers), are all letter-number (or 2 hexit, but I suspect the former) subdomains of cctld.afilias-nst.info ; which on its face and by WHOIS are part of Afilias Limited, a subsidiary of Donuts, the same subsidiary that bought the holdings of Internet Computer Bureau (including the assignments and core infra of .io, .sh, and .tm) in 2017 before selling itself to Donuts Identity Digital in 2020
sooo ... it definitely seems like the Mongolians are at least in the loop (and whois is handled through a nic hosted in Ulaanbaatar), but de facto control seems still to rest in Bellevue, WA, USA for the time being. (A place rather equally not in Minnesota)