Channel Type "MSF"

My relatively new MikroTik GW works fine. I’m just curious about the listed channel types “MSF”. I could not find any documentation. “LoRa” and “FSK” are familiar, but what does “MSF” stand for? Seems to be not changeable.
Any idea? Thanks!
MikroTik_Channels

Multiple Spreading Factors? However you might want to ask at the mikrotik forum given that it is their firmware displaying the message…