This feat will let you pick your bonuses for backgrounds for 2024 character creation.

Add this as a Background Granted Feat, then you can pick the aiblity scores you want to improve at character creation.

See "Background Ability Bonus +1/+1/+1" feat for other background ability score option.

I am no expert at the creation system, so I do not know how to remove the ability score from the list of the other drop down menus.  So, you will have to use honor system and not pick one you already have picked.