It has been anticipated that the OPPO R17 would be replaced by the R19, a phone that may have a punch-hole selfie camera, in 2019. Howeer, the vice president of the Android OEM, Shen Yiren, has taken to Weibo to disrupt this line of speculation.
https://www.notebookcheck.net/The-OPPO-R19-will-not-be-released-this-year-OEM-Vice-President.409326.0.html