In america, the asus dvdr drives I see are DRW-24F1ST and DRW-24B1ST.
Over the past few yars, the DRW-24F1ST appears to be an LG GH24NSD0 (or D1, D5/D6) series rebadges.
The DRW-24B1ST I haven’t seen lately. The last time I saw any just right before the pandemic started (circa late December 2019), they appeard to be LiteOn rebadges. Some were made in China, while others were made in the Philippines.
(I’m speculating LiteOn might have purchased the old Samsung dvd drive manufacturing facility in the Philippines, after Samsung/Toshiba TSST filed for bankruptcy back in 2016/2017).
The DRW-24B3ST appeared to be a boxed version of the DRW-24B1ST. Dunno about currently.