The hand of the Messenger of Allah ﷺ never touched the hand of a woman in a pledge of allegiance.
حدثنا يحيى بن آدم حدثنا ابن مبارك عن معمر عن الزهري عن عروة
ما مست يد رسول الله ﷺ يد امرأة في بيعة قط
Its isnad is sahih, it was mentioned previously at 25076.