It's not like that ..I do not use any custom theme either. My alarm icon is on the right - the camera hole (Mi 10 - umi) is on the left-hand side (notifications level). Maybe to do with balance? I've noticed under Additional alarm settings there is a switch for 'Notification before ringing'. That puts the additional notification on the left-hand side.
An hour before alarm rings then it saws notification on the left side and clock icon remains on the right side when you choose the option you said ..
And becomes like screenshots below..
@Poney70
Mi 9 has waterdrop in the middle , i didn't say only with notch .. i said devices with notch , waterdrop or camera dot in the middle of the screen..