It's not flowering because it's not getting what it needs to flower, not because it's a plant that never flowers. From the appearance of the foliage it looks like it's being kept as a house plant under ordinary indoor conditions. Moved into a brighter, more humid situation and a larger container, allowed to develop more fully it would probably soon start blooming. The commonly grown, frequently asked about Epiphyllum that produces a percentage of flattened, paddle-like stem sections is E. oxypetalum. Because this one is so prevalent chances are that is what you have. Otherwise, without the flowers having been seen it seems the plant asked about here could just as well be something else. There are many species of epiphytic cacti in cultivation including those in other genera besides the three mentioned so far here. https://www.bing.com/images/search?q=epiphyllum+oxypetalum&qpvt=epiphyllum+oxypetalum&qpvt=epiphyllum+oxypetalum&FORM=IARRSM

That's a Cyclamen - not the easiest thing to grow indoors. I've tried 2 or 3 times a few years ago. Lena

Thank you juneroses. Now all I have to do is find a bright light space for it. Our friends are moving and have gifted us all their plants. Now to find places for all of them.

Could be birds. But also wind, other wildlife, tracked in by shoes or clothing, etc. It also spreads rhizomatously.