But that is speculation on my part.
That speculation is partially correct. Recall Morskoi Sbornik's announcement of 7/5/21:
"Government of Russian Federation announce sailing of 4th Cruiser Squadron and 15th and 16th Corvette Flotillas to French naval base at Cayenne. One Betelgeuse class oiler accompanies them. 4th Cruiser Squadron consists of four Admiral Lazarev class light cruisers, and the two Corvette Flotillas consist of twenty Lilya class corvettes. These ships are expected to take up maritime patrol duties in South American waters.
In a related announcement the French government reates that 4th Flotilla Torpellieurs, consisting of 12 Arabe class destroyers, and the Seaplane Cruiser Aviator, have also departed for Cayenne."
These forces were sent to contribute to a joint Atlantis/Iberia/France/Russia force to protect neutral shipping. Subsequently, the South American Quadruple Alliance was formed. The Russian Federation considered that, in view of this development, the joint naval force might require reinforcement in some circumstances. These circumstances have not arisen, and as long as they do not, 2nd Battle Squadron will stay at Brest, and will eventually return to Sevastopol.
The Russian Federation indeed have no direct interest in the Carribean, and do not desire to have any.