Question about LG OLED65C35LA

Yes, the LG OLED65C3PUA, which belongs to the same series as the OLED65C35LA model, has an ARC (Audio Return Channel) capable HDMI connection. More specifically, one of the four HDMI 2.1 ports also serves as an eARC (enhanced Audio Return Channel) port. It is likely that the OLED65C35LA model has similar specifications, but for absolute certainty you should check the manufacturer's specific product information.