Stevie leaf extract is a petroleum base sweetener. It was used as an artificial sweetener , but then they found that it could be naturally occurring in small quantities and rebranded. It works like natural flavors where it can still come from petroleum so long as its naturally occurring with some source. I find it extremely bitter and soapy, just like almost every other artificial sweetener.
Did you enable CSM? By default you should never see a device to boot from and should only see valid UEFI targets.
The last time it failed it was supposed to come back with allowing modules instead of parts. Apple would be fine with selling “modules” as they consider their devices to be top case, bottom case, motherboard, battery, and screen (has stuff attached.) If they can have a needs calibration some where to shame 3rd party repairs and not allow board level repair it is just what they wanted.
Lg tried it on refrigerators, even though refrigerators are not delivered in boxes.So the customer never receives them. The delayed or denied every warranty claim on their stupid 2 stage refrigerant pump, then said since the customer opened the box with the terms agreement that they couldn’t sue. It took more than a year to resolve just that there could be a class action lawsuit against LG.