Taiwan's AU Optronics says that while the company still produces OLED displays, and has the capacity to mass produce flexible OLEDs as well, the company sees the flexible (and foldable) OLED market still at an "initial stage in terms of market acceptance and cost structure", and the company does not have any plans at the moment to invest in further OLED capacity.
AUO says that it has "accumulated its OLED expertise for quite some time" - and indeed AUO has been developing transparent OLEDs for AR applications, foldable displays and has lately started to invest in ink-jet printing processes.
AUO started to mass produce OLED panels back in August 2014, with a focus on wearable and VR panels. AUO production capacity is relatively low at its AFPD Gen-4.5 LTPS fab in Singapore. In May 2019 it was reported that AUO plans to build a 6-Gen OLED ink-jet printing production line, but it seems as if the company hasn't yet committed to such a venture.