Dought & clear - , She covered her face during ‘Umrah due to lack of knowledge; whatdoes she have to do?.

For the first time in 'Umrah my wife uncovered her face in Makkah, as
they were saying that it is not permissible to wear niqaab, and we did
not know. So my wife took off the niqaab and we completed 'umrah,
tawaaf and sa'i. After wegot back to our own country, we found out
that she should have covered her face with the shaylah (headscarf). My
question is: is there any expiation or is her 'umrah not accepted? I
hope that you can adviseus.
Praise be to Allaah.
Firstly: the woman in ihram is not allowed to wear the niqaab because
the Prophet (blessings and peace of Allah be upon him) said: "The
woman in ihram should not wear niqaab or gloves."
This has been discussed previously in the answerto question no. 12516 .
Secondly: the prohibition on a womanwearing niqaab whilst in ihram
does not mean that she should leave herface uncovered in the presence
of non-mahram men; rather she must cover her face with something other
than the niqaab orburqa'.
The Prophet (blessings and peace of Allah be upon him) did not
instruct the woman in ihram to uncover her face; rather he told her
not to wear the niqaab. There is a difference between the two matters;
she should not wear the niqaab but she should cover her face with
something other than the niqaab, such as the scarf.
It was narrated that 'Aa'ishah (may Allah be pleased with her) said:
The riders used to pass us when we were with the Messenger of Allah
(blessings and peace of Allah be upon him) in ihram. When they drew
close to us, one of us would let down her jilbaab from her head over
her face, and when they had passed us we would uncover it again.
Narrated by Ahmad, 23501; Abu Dawood, 1833; classed as hasan byal-Albaani.
Shaykh al-Islam (Ibn Taymiyah) said: She may cover her face and her
hands, but without wearing the garment that is made to fit that part,
just as a man is not allowed to wear trousersbut he may wear the izaar
(waist wrapper).
End quote. Majmoo' al-Fataawa, 22/120
This issue has been discussed previously in the answer to question no. 120377
Thirdly: even though it was a mistake to uncover the face after
entering ihram, the 'umrah is not affected bya woman uncovering her
face after entering ihram or whilst circumambulating the Ka'bah
(tawaaf) or going between as-Safa and al-Marwah (sa'i). The 'umrah is
valid and we hope that it will be accepted in sha Allah, especially
since your wife uncovered her face due to lack of knowledge of the
Islamic ruling.
And Allah knows best.