I can confirm that power down of an OLED SSD1306 on i2c bus #1 of TTGO Beam v10 will block the i2c bus, thus communication with PMU AXP192 is no longer possible and we get stuck in a chicken-and-egg problem. Thus, moving display to i2c bus #2 sounds like a reasonable solution, but is it possible to keep the hardware pins for direct 1:1 soldering of display to the TTGO header, without wires?