Posted - 02/27/2023 : 12:07:31
Right, that's correct.
I suppose the reasoning is that customers select the quantity when adding to cart and it less likely they will need to adjust the quantity on the cart page when they have already selected it before adding to cart.
There is the facility there just in case, but adding the +/- there would take up precious real estate on the cart page when it's unlikely to be needed.
I expect it could be custom coded if you want to try a post in the developers forum.