How to make Death Chest on command blocks on 1.16.5

Setup:
scoreboard objectives add deaths deathCount
gamerule keepInventory true
In repeating and chain command blocks (or datapack tick function)
execute as @a[scores={deaths=1..}] at @s run setblock ~ ~ ~ chest
execute as @a[scores={deaths=1..}] at @s run data modify block ~ ~ ~ Items set from entity @s Inventory
execute as @a[scores={deaths=1..}] at @s run clear @s
execute as @a[scores={deaths=1..}] at @s run scoreboard players set @s deaths 0