I know it is common to propagate by seed. After some research I found they are not true to type:
"To find out, we planted seven seeds taken from the commercial yellow Florida variety 'Arkin.'
Trees began to produce fruit in 2-3 years. Four give orange fruit, but on three the fruit turns from green to nearly white, to pale orange as it ripens. Two of the orange-fruited trees are very sour, one is moderately sour, and the other is sweet. Two of the light-colored fruits are slightly sour with fair flavor, but we think that one tastes as good as or better than commercial varieties. (It will not become a commercial variety because the ideal commercial shape here is long with short "wings," which are less likely to be damaged in shipping. All these seedlings were shorter and had longer wings than the commercial varieties.) Several are good enough to leave for fruit production.
If you do not have sweet carambola in your country, you may request a packet of seed. You may even find one that will be so good it will become a new variety for your country."
https://echocommunity.site-ym.com/resource/resmgr/a_to_z/azch12ge.htmMy favourite Starfruit💛 The colour is lighter and it is a lot sweeter than the regular Starfruit.
10 seeds for 8 usd
Sounds interesting! How do you propagate this one? If I remember right, starfruit isn't that true from seed.