Yes, your card will be read if, for example, it is in the side pocket of the bag and the card is in an upright position next to the gate, and if the fabric of the bag is not insulating against it.

Therefore, it is better to carry the smart card in your hand and pass it over the smart gate to ensure that it is read as soon as you pass without having to stop.

If the card is hung with a medal in the bag

This is better for you and more convenient and guaranteed to read it as soon as you cross without having to stop and then take it out of the bag👍🏼.