Khulwah after concluding the marriage contract and before announcing marriage
if the husband has concluded the marriage contract with his wife and fulfilled all its essential elements and there are no impediments to it, it is permissible for him to meet her and sit in Khulwah with her even if this is before the announcement of the consummation of marriage in accordance with the customs prevailing in the country.
it is not permissible for the wife to remove the veil in the presence of her husband's uncle, because he falls under the category of non-Mahrams (not unmarriageable relatives) before whom a woman must not take off her veil, according to the general evidence on this issue. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.