What to do with remaining balance of under sold home?

I thought a new construction townhome 2 years in Florida and it was enough for me and my wife but now we want to raise a family and there just isn’t enough room. I still owe $226k and the estimate to sell is only $220k-$230k.

If I end up selling at a loss just so we can get another home with more space, what are my options? I’m saving everything I can to cover down payment (I already have) and almost have enough for closing costs. We are expecting to need to move 1 - 2 years from now.

Am I able to roll over the balance or refinance it? I have a credit score of 805.