The Realme 1, 2, C1 and U1 were all released at various points in 2018. Despite this, their maker has just announced that they will not receive an update to ColorOS 7. This is an upcoming software skin based on Android 10 that the company shares with OPPO.
https://www.notebookcheck.net/Realme-cuts-some-2018-phones-out-of-its-Android-10-plans.445543.0.html