What is the ruling regarding the women's prayer area, and is it permissible for worshippers in the old mosque to pray on Friday if the new mosque becomes full, given that there is a passageway separating them?

The prayer of women in the upper prayer area is valid, and it is permissible for them to follow the Imam as long as they are in the same mosque and can see the Imam and the first rows, or can hear the takbir. As for the prayer of people in an old mosque connected to another mosque, if the rows are continuous between the two mosques, then following the Imam is valid. However, if the rows are not continuous and there is a separation (like a corridor or a road), scholars have differed regarding the validity of following the Imam. The preferred and more cautious approach is to connect the rows between the two mosques to avoid this difference of opinion.