Sforno on Leviticus 14:20/ספורנו על ויקרא י״ד:כ׳

1וכפר עליו הכן וטהר, he will have attained a sufficient level of ritual purity to be allowed to partake in sacrificial meats, and entering holy precincts (if he is otherwise qualified to do so). Compare our sages in Negai-im 14,3 that “as soon as he has brought his atonement offering he is free to again partake of sacred foods.” (the portions of the peace-offerings normally consumed by the owners of the animals.)