Function vset_lane_u8 

pub fn vset_lane_u8(a: u8, b: uint8x8_t, const LANE: i32) -> uint8x8_t

Available on (AArch64 or ARM64EC) and (AArch64 or ARM64EC or target feature v7) and (ARM or AArch64 or ARM64EC) and target feature neon only.

Insert vector element from another vector element Arm’s documentation