Dear Samsung, I just upgraded to the S9 from a S5. Loved my 5 but after time it just lagged so much. Besides not being able to set a individual sounds for each contacts text message (which I think they are fixing) the calendar also is missing alot of things the older version had. I use to love to be able to add a Birthday cake to the someones calendar entery so you would know it was someones birthday at a glance. Also I could add a color background one things like the Kids School days off or even a color for my days off to quickley see. I hope some of these things come back in updates.
I've also seen threads concerning adding ringtones so yes hopefully they'll be able to remedy this.
I use the stock Samsung Calendar app and as such can choose a colour in it and add.a birthday cake to the calendar entry.
Mine looks like this.....
Current Phone ~
Samsung Note 20 Ultra 5G SM-9820 _256Gb SnapDragon 865+
Samsung One Ui 2.5/ Android 10.