Q.My Victoria Plum Tree Had Mis Shaped Leaves And Not Many Plums. What Can I Do ?
I can send photos from last year

Certified GKH Gardening Expert
The branches look very crowded which limits sunlight, so some pruning is in order. Also check for pests. These articles should help:
https://www.gardeningknowhow.com/edible/fruits/plum/growing-victoria-plums-in-gardens.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-fertilizer.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-fruit-spray.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-fruit-thinning.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-trees-not-fruiting.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-pruning.htm
https://www.gardeningknowhow.com/edible/fruits/plum/control-leaf-curl-plum-aphids.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-tree-diseases.htm