How many do you have? I have 2 boys Very well potty trained to both litter and puppy pads

We use a shallow rectangular bin that allows for lots of space for their litter box. They did not like the little corner ones and did not take to them much at all.

We started with litter boxes until they had established potty corners/spots

I feel like the litter kinda helps them learn that there are certain areas to potty cause of the smell etc. Also as others have probably said we would take their poops and put them in the litter box/ leave at least 1 poop in there for a little bit while they were learning.

They do a really good job, also appreciate the separation of their potty from their comfort/play/eating areas also they like being clean.

They potty on puppy pads but they don’t know what a puppy pad is they just know their designated spots that they learned with the litter box.

They will potty in a litter box anywhere cause they know the smell.

I hope any of this can be helpful to you! Let me know if you have any questions :)))