Angelina otherwise the rings wouldn't make sense.
Although I'd add that in comparison to the price of a high-quality custom-made belt, the surcharge of D-rings, O-Rings, or whatever connection adapters used for the respective model, is quasi negligible. (AFAIK, even with the 3 Rings/Adapters recommended by certain popular manufacturers, it's still less then 100 € surcharge. Compared to an order of magnitude more for the belt itself...)
Of course I'm aware of the "not so nice" social aspect of altering her order without her OK first. I dislike moves behind someones back. Particularly for a topic that for so many is so strongly associated with bonding, reliability, trust and care.
Just in the matter itself, it was economically smart to add them out-of-the-box, because it allows options. (And No, uninformed partners, parents, etc. reading this, options should not mean arbitrarily adding accessories to someone else's belt for no reasons. But I might come to that some other time.) I see the risk for handling keyholding unwisely.
And as a short interjection: Angelina, I'm sorry to read, how your personal introduction to the topic had been handled; much has been written about that already. Though I am amazed how constructively and positively you've handled it.
Yet speaking of risk, avoiding the topic of accessories is risky as well. You know better than I the reports of users that didn't start with accessories but at some point of point actually benefited from them or simply wanted to try.
Actually, there is some really prominent user of this forum who has always been wondering how it was with bands, but couldn't even privately experiment since her Tollyboy hasn't been delivered with D-Rings. I wouldn't say whom I was talking about, now. ;-)
So, even if buyers believe to be sure they wouldn't need rings in the foreseeable future, I'd always recommend adding them to the cart. If possible, take those that nicely fold in, when not in use; then forget about them unless further accessories are already agreed on. (Again, be fair to whoever is involved!)
Adding them after the initial order would either require paying way more money later (incl. doubled shipping), or significant DIY tinkering (don't know if adding rings on your own might even waiver warranty?), plus extra waiting time in which you have to somehow compensate for the missing custom belt. Stupid ideas in this context are the bigger risk, IMO.