Planning to fly Starlux SFO-TPE-SIN. I booked the tickets already through them directly, and I believe Starlux, like EVA and CI, uses Amadeus. In their GUI, there are only first/given name (without "s") and last name boxes, and of course, I forgot to enter my middle name. After all this time flying JAL and AA (which I believe use SABRE), my brain defaulted to entering only my first and last name, and middle name if a separate box is there or the first box said "First and middle names". Will it cause problems for me?
Surname on Passport and GE (Western): Seed
Given names on Passport and GE (Western): John Apple
NAME ON BOOKING (Western): SEED/JOHN

I know with Chinese names it will definitely matter, but less so with western names. Based on my experience, I experienced 0 issues with other carriers like JL, AA, SQ, TR, KE, and MI (except at SIN, JAL ground handlers handwrote my middle name - because it did not get reflected on my JAL reservation but was there on my AA booking). Not sure about Taiwanese carriers though, especially Starlux, but I did recall someone posting on Tiktok that she got denied boarding by EVA due to missing middle name, although it was to Vietnam instead of SIN. I am not sure whether booking it with only my first and last name will cause me to lose PreCheck, since PreCheck has my middle name. My Alaska Mileage Plan account only has my first and last name, though.

Thank you!