It's inaccurate to say "most" are combatants. The estimate is usually 2/3rds are civilians and 1/3rd are combatants.
Of course it's hard to get real answers on all these questions - Gaza's Hamas-run MoH is not exactly trustworthy, and don't publish a split of civilians vs combatants. And Israel, even assuming you do trust its numbers, doesn't publish estimates of Gazan civilians killed either.
Of course it's hard to get real answers on all these questions - Gaza's Hamas-run MoH is not exactly trustworthy, and don't publish a split of civilians vs combatants. And Israel, even assuming you do trust its numbers, doesn't publish estimates of Gazan civilians killed either.