Doesnt look like it to me-
Looks more like a rose apple (Syzygium jambos)
here is my Chilean Guava from Ben at Sacred Succulents, a bit whacked from winter but has the leaf structure you describe
this is the "Blanco" clone of theirs
Ugni molinae “Unu” “Murtillo” “Chilean Guava”
Myrtaceae. Ornamental evergreen shrub to 6'. Cup-shaped fragrant white-pink flowers and 1/3" rose-purple edible berries. Southern Chile. The fruit
has a particularly delicious flavor, being aromatic and sweet. The leaves are rich in antioxidants, the Mapuche make a analgesic tea from them and brew
chicha from the fruit. The roasted seeds are a coffee substitute. Ugni candollei is used to induce dreaming. Commercially cultivated in Chile for the
fruits, it was popular in 1800s England, Queen Victoria’s favorite fruit! Does excellent here in northern California. Dislikes alkaline soil, but is very
easy to grow. Sun to half shade, drought tolerant when established. Can be trimmed as a hedge. Deserves wide cultivation. Higher germination with 30
days cold. Z8a
Ugni molinae ‘Blanco’ – A clone we selected from a batch of seedlings for its pink blushed whitish fruit (when fully ripe) that is sweeter and less tart
than others. Over the years we've found that the fruit color can very from season to season; whitish to pink. Z8a