should I freeze a two-day refrigarated meat sauce?
Such a sauce should last 3-4 days at least in the refrigerator (based on comparing to Still Tasty's turkey soup or stew category, which is a conservative match; plain spaghetti sauce indicates 7-10 days but this probably not based on poultry).

This clock is based on refrigerated time; freezing essentially stops the clock while the food is fully frozen.

So yes, it should be safe to freeze your sauce.