prob similar from natural talents
LSRM just isnt trained enough as they were rushed and mostly banking on sakura/chaewon hype. kazuha/eunchae have minimal training eunchae about a year, kazuha 5-6 months, sakura has been active most her life(she joined IZ*ONE straight from jpop), yunjin trained a bit but literally got dropped as a trainee, and even chaewon has minimal although shes got enough talent(as with any korean who was in IZ*ONE)
meanwhile chearyeong trained for 6 years
ryujin 5 years
lia 2-3 years in total