Uncooked rice freezes nicely, cooks the same on thawing as it would if never frozen.
If it is cooked and frozen as a separate dish, it may be a little watery when you thaw it but the reheating process will absorb the moisture.
If it is cooked and frozen as part of a dish (casserole, etc), it might add a little watery-ness but the reheating process will absorb the moisture and not be a problem.
That's been my experience over the years, anyway:) Hope this helps.
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