Minecraft-Custom-Roleplay-Data/data/custom_item_model_data/function/set_model.mcfunction

$item modify entity @s weapon.mainhand \
    {\
        function:set_components, \
        components: {\
            "minecraft:custom_model_data": { "strings": [ $(Model) ] } \
        }\
    }
$title @s actionbar [{"text": "Set Custom Model Data to ", "color": "green"},{"text": "$(Model)", "color": "aqua"}]
execute at @s run playsound minecraft:entity.villager.work_cartographer player @s ~ ~ ~ 0.6 0.6