With the subjugation of Mariupol, the Russia will be looking towards both incorporating the Eastern provinces, Donesk etc, and also swinging around to take Odessa, I would expect.

By taking Odessa, the Russians would then control part of the pathway into Transnistria, which is very important. Transnistria is that place without passports or any national control where all the things that shouldn't happen in Europe happen in Europe. The Great Conduit for spies, weapons, trafficking, terror etc from all sides make free use of Transnistria. To off-load the weapons pouring into Ukraine, you use Transnistria to get them out to Africa for sale.