The Shadowlands Raid Finder Solo Queue option is likely coming in Patch 10.1.5, according to new spell entries.
Shadowlands LFR Solo Queue Coming in Patch 10.1.5?
Blizzard added multiple spells to the game that hint at the arrival of the long-requested Shadowlands LFR solo queue, allowing players to queue for the raid alone and collect transmog.
The spellIDs range from 412855-412866 and are named after the Shadowlands Raid Finder wings (e.g. Queue for the Leeching Vaults).
Here are all the new spells taken from the database table.