Frankly, I wouldn't worry about any threat from the Russian contingent in Transinistria. As you pointed out here, it is not a sufficiently sized or equipped force to be anything other than a slight pain in the butt.

It possesses neither the operational logistics capability or the size to make any meaningful contribution to Russia's invasion in Ukraine.

Further, even if the Russians tried to land more forces in Transinistria as a lodgement, they have to do so under the threat of Ukrainian Neptune missiles and UAVs. Afte losing one LST early in the war, I doubt Russia is willing to risk another on a venture that is completely futile at best.