Many people have been teleworking since the pandemic began, and children have to do their schoolwork at home. That's definitely had an impact on the distribution of invisible work. The family situation isn't the same for everyone, but it's generally up to mothers to do the invisible work. Mothers provide much more support to children doing their schoolwork at home even when both parents are teleworking. If the children have problems during the day, the mother's work is interrupted far more often than the father's. That's obviously not always the case; it's a generalization
I nevertheless think that the pandemic and telework have increased responsibilities for mothers in many families.