Last month we reported that Sharp started producing OLED displays in June 2018 with aims to ship its first OLED Aquos smartphone in Q4 2018. At IFA 2018, the company demonstrated its first OLED smartphone, the 801SH.
The phone features a flexible edge-type and notch-type 6.2" 3120x1440 AMOLED display, and indeed it is likely that this display is produced by Sharp itself.
The OLED displays are reportedly being produced at Sharp's 4.5-Gen Taki plant which has been converted (partially) to OLED production. Sharp aims to convert a total of 30,000 out of 90,000 monthly LCD substrates to 22,000 OLED substrates, this will probably take time and the company's current capacity is probably very limited.