Q.I Have Tomatoes Growing On My Potatoes Branches
I have raised bed and grow potatoes spring onion and lettuce this year however I found two tomatoes growing on the branch of a potatoe is this common.

Certified GKH Gardening Expert
This is the fruit of the potato plant, but they aren't tomatoes. Being a relative, potatoes make a similar looking fruit. They are toxic, just like the leaves. You can use the seeds for a different generation of potatoes that are not clones, but they may be totally different than the parent plant.
This article will offer more information: https://www.gardeningknowhow.com/edible/vegetables/potato/potato-plant-flowering.htm


