The loan repayments, as LP has pointed out, are an Owners Corporation (OC) expense, not an individual one. The OC is the legal person to whom the loan was made. Levies for the OC budget are to cover all the OC’s expenses, including loan repayments.
Where I am (ACT), it takes an unopposed resolution of a general meeting for the OC to resolve to levy fund contributions worked out by some means other than in proportion to unit entitlements. So, if NSW has a similar provision, it might be possible to work something out but you would need to have everyone on board and it would require extra accounting work to ensure it all remains fair without detriment to anyone, both to those who paid out their share early and to those who didn’t who need to cover the correct remaining interest.
It might be possible if it is clearly shown to be a win-win with early and late payers both benefiting from contributing less to interest payments than they might otherwise have done. I would advise you to be very careful how it is presented. Otherwise you could have one or more owners getting ‘the wrong end of the stick’ and convinced that this is a swindle of some sort. People get funny about money.
Cautionary tale: I recall an instance of someone (who was an economist) making a fundamental error about a matter involving money. This person wrote to owners to show them that a proposal from a committee was much more expensive than it actually was. I thought the error in the maths as presented was so obvious that this person had shot themselves in the foot. Sadly, many just believed the conclusion without looking at the numbers. The committee responded explaining the error but I learned that it is hard to get people to read words and numbers are even harder. If the numbers refer to money, some people get suspicious.