I'm wondering how your parents manage diapers buying and "stocks".
Do/did you have to ask them to buy some new diapers when you are running out of them, or do they have a look at how many you used?
As I'm just slightly incontinent (partly because of weak bladder muscles), I've almost always worn diapers. But when I was around 10, I became a bit lazy because of them, as even when I was at home I didn't care and used my diaper all the time, and changed myself pretty often.
When my mother asked to the doctor if it was normal that I didn't go anymore to the toilets, she discovered that I was indeed lazy some times and we (well, she) therefore established a rule that I would get in my shelf 21 diapers a week (adding them each saturday evening), which means an average of 3 a day, which would be totally sufficient.
If at the end of the week there were some extra diapers left, I got some extra pocket money and we moved the extra diapers to the reserve. The reserve was in my parents shelf and there was always an extra package there in case I asked for more diapers before the end of the week (meaning no one left in my shelf). In that case I got some some but had less pocket-money. And of course there was no way to get some diapers from the reserve without asking for it. If used them all the diapers in the week, I got the usual pocket money amount.
This was a way to be more autonomous and to encourage me to be more careful at the same time. We used this system quite a long time.