I don't think bunq works that way. Let me explain why, and I don't think it would be possible for them to show any other balance than the current one.
I keep track of my saldo on my business account obviously. A while ago the saldo was off with almost €100 and I couldn't match any transaction that would be the cause is it. The numbers just didn't add up. Then I found that an eBay transaction from 3 months earlier had been reverted in my favour, for unknown and irrelevant reasons. However, this showed up nowhere in the recent transactions. I only saw it by chance in the cancelled eBay transaction from months earlier.
Now, imagine showing the saldo after a transaction in all previous transactions. They would have to update this in every transaction when something like this happen, which kinda defeats the purpose.