In Hanafi law, a woman may perform iʿtikāf in a designated prayer area at home (masjid al-bayt). That clarification is from Hanafi jurisprudence rather than an express phrase of the short passage quoted here.
The majority of other jurists do not recognise an ordinary home prayer area as a qualifying mosque for iʿtikāf. The difference should be identified as a juristic disagreement.
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Bab al-Iʿtikaf: Rules, Restrictions, Invalidation and Vows
In Hanafi law, a woman may perform iʿtikāf in a designated prayer area at home (masjid al-bayt). That clarification is from Hanafi jurisprudence rather than an express phrase of the short passage quoted here.
The majority of other jurists do not recognise an ordinary home prayer area as a qualifying mosque for iʿtikāf. The difference should be identified as a juristic disagreement.